AT THE MOVIES, Cher makes an impression in Mask (right), a drama in which she plays the tough-but-loving biker mom of a deformed teen (Eric Stoltz); three years later, she'll take home an Oscar for Moonstruck. ON TELEVISION, live programs shut down as scriptwriters continue a strike that affects Saturday Night Live, The Tonight Show, and Late Night With David Letterman. The Writers Guild of America will hold out against filmmakers and TV producers until they settle for better benefits and a slight increase in pay. IN BOOKSTORES, 37-year-old insurance broker Tom Clancy's first novel, The Hunt for Red October, is a surprise hit. AND IN THE NEWS, Dan Haggerty (TV's Grizzly Adams) is convicted of selling cocaine to undercover officers. Haggerty pled guilty, saying he felt ''like a trapped eagle'' while waiting for the verdict





