GOOD MORNING: Lana Turner has completed four of the six weeks of radiation on the inoperable tumor in her throat and she’s doing better than anticipated, her daughter Cheryl Crane tells us. “Lana would have told you so herself,” said Cheryl, “but she’s resting her voice, which is a little scratchy (temporarily) from the radiation.” Crane is a realtor at Alvarez, Hyland & Young, whose member Elaine Siegel was murdered last week during an open house on Coldwater Canyon. Crane says, “We are all in shock — in panic over it. I never work alone (at an open house), always with Josh (LeRoy) and never at night.” Siegel was a former makeup artist and hairdresser. … WB sees “Malcolm X” again this week–at 3 hrs. 10 mins. Guy McElwaine saw Joe Eszterhas in Hawaii, reports he’s wound the “Sliver” script for Bob Evans and is writing “Sixth Sense” for Alan Ladd Jr. at MGM. And Eszterhas’ “Sacred Cows,” about a candidate’s weird farm foray, is now being read by Mike Nichols. At LAX, en route to Hawaii to join Guy, wife Deborah was robbed of her purse (containing tix, traveler’s chex, cash)–but she spotted the escaping thief. Her shouts caught the attention of trombonist-thesp Jim Moseley, who took chase, tackled the suspect and held him until cops took him away. P.S.: Guy took a meeting with Moseley on his return. … Among those at last week’s Democonvention was Dominick Dunne, who will include notes from same in his next novel, “A Season in Purgatory” (Crown). It’s about betrayal among friends — Hollywood doesn’t have to worry about this one; it’s set mostly in the East. Asked whether he’d depart Vanity Fair and join Tina Brown at the New Yorker, Dunne noted he has a pact with V.F. — and a move’s “not yet worked out”– while Dunne’s on leave to write his book. As for Dunne’s reaction to the convention–”I’m going to work hard for the (Demo) ticket.” … Jack Valenti returned to his D.C. MPAA offices from the convention, also high on the Clinton-Gore ticket, sez he knows Gore–and his father as well. Asked about Tipper Gore’s stand on rating albums, Valenti claimed it compared to the Motion Picture Assn. putting ratings on films. “She never suggested censorship.”BILL COSBY, on his birthday last Sunday: “I’m the speed limit (55) now. I’m not in the right lane, I’m not in the left lane. I don’t care who passes me, and I don’t care who I pass.” Cos completed 70 installments of “You Bet Your Life,” which start airing Sept. … Susan Blakely and producer-husband Steve Jaffe were surprise-dined on their 10th wedding anni by Ann and Delbert Mann at the Four Oaks. Susan stars in “Russian Holiday,” a Greydon Clark production to shoot in St. Petersburg, with Clark directing, Jaffe producing. David Reskin scripted From Paris, Ally Sheedy says she is enjoying working so much in the dual-language (first English, then French) “Shooter” for NBC and Canal Plus, “I would like to stay here, and I’ll ask Canal Plus if there are more projects.” (She did “Kiss and Tell” for them earlier in the year.) Sheedy’s French is near-perfect–we noted. She was joined, until yesterday, in Paris by friend David Lansbury, who heads to Vermont to legit “Country Club.” …”Sans Rancune,” the French adaptation of the Sam Bobrick-Ron Clark “No Hard Feelings,” reopens in Paris Aug. 4, running till Dec. and then touring France. And Clark’s “The Incomparable LouLou” is heading to London’s boards starring Line Renaud next summer for producer Martin Newcombe. It’ll include tunes by Line’s husband, Lulu Gaste. In Paris last month Line was readying to star in TF-1′s telepic “Polly West Is Back in Town,” in which she’ll play the title role of a Mae West-like star who returns to her little French village with a rich Texan husband and son played by Terence Ford, Harrison’s brother. For her character, Line was still-photo’d a la Mae West. DISNEY TOPPERS are back from a retreat in Jackson Hole, Wyo. David Kissinger , VP of development for Disney network TV, marries Alexandra Platt Rockwell, sr. VP of creative affairs for Jim Henson Prods., Aug. 8 at the Mashomack Club in Pine Plains, N.Y. “90210′s” Brian Austin Green, who plays Tori Spelling’s b.f. in the series, signed with Bettye McCartt of Metropolitan Talent Agency. Talented young Green (17) will also intro his musical group on the series this season. … Camden ITG’s Merritt Blake signed Rod Steiger, John Savage and Diana Scarwid. … California Spirit VIII’s “The Garden Party,” a gourmet gala to benefit the American Cancer Society that was rained out last Sunday, has been reskedded for Aug. 2 — at the same lavish private home, with top chefs contributing their specialties. Wolfgang Puck, Pati Miller-Gianne, Sherry Lansing and Kelly Brown host. … The Wolfgang Puck Charitable Foundation has also set Sept. 19 to celebrate its 10th year, $10 million and 1 million meals–to Meals on Wheels. Vincent Price co-hosts with Puck at the Universal Studios backlot feed, featuring 25 of the country’s top chefs and 70 vintners. … Roseanne Arnold, with a bandage across her nose from her recent surgery, dined with husband Tom at Kate Mantilini’s. … Oscar-winning tunesmiths Ray Evans and Jay Livingston were toasted by Evans’ hometown, Salamanca, N.Y. The town, pop. 6,000, has an unusual place in the celeb world–105-year-old George Abbott grew up there, and it’s the only city that lies completely within an Indian reservation–stemming from a treaty George Washington made with the Seneca Nation. You never know what you’re going to learn here.