Charles Higham, whose recently published book "Errol Flynn, the untold Story" charges that Errol Flynn was a Nazi agent and a homosexual, is being used by the deceased actor's family on charges of defamation. Rory Flynn and her sister Deidre have filed the civil defamation suit in Quebec, Canada, because, according to San Francisco attorney Melvin Belli, "Quebec is the only place where you can sue for defamation of a dead person."

"The family would like his name cleared," said Belli. "He wasn't a homosexual or a Nazi."

Higham claims to have documented proof of all his charges. In his book, he thanks Flynn's daughters for their help. Rory Flynn claims, however, that they were tricked. "He convinced all of us that he loved Errol Flynn and that he was writing a wonderful book about him."

Said Belli: "The book is made out of whole cloth. It's a vicious book and untrue." Winning the suit, he added, would serve as a "good example," and might prevent future books of the same ilk. "It's most unfair that you can have open season on deceased people."

Receiving a prize of a different kind for his efforts, Washington novelist Warren Adler, who in October kept his pipe lit long enough to win a pipe smoking championship, this week was awarded a $2,500 hand-carved Meerschaum pipe. Hand-carved pipes in themselves are rare, but Adler's is given added distinction in that it is carved in his image.

Craftsmen of the Alfred Dunhill of London Shop, working from photographs to ensure accuracy, spent eight months creating the pipe. The last set of pipes to be specially commissioned like Alder's were done in the likeness of Queen Elizabeth and Prince Phillip in honor of the queen's Silver Jubilee.

Former Paramount production chief Robert Evans, who produced "Urban Cowboy," "Love Story" and "The Godfather," pleaded guilty yesterday in New York to a federal charge of possession of five ounces of cocaine. Also charged were Evans' brother, Charles, and Michael Shure, a partner in the brother's Manhattan construction firm.

The charge, a misdemeanor, was filed in a plea bargain in which the defendants agreed to plead guilty in order to avoid indictment on more serious charges. It carries a maximum penalty of up to one year in jail and a maximum fine of $5,000.