SHIRLEY Jones has a beef with Playboy. As we reported in May, the squeaky-clean “Partridge Family” star, now 75, was interested in doing a Playboy spread. But after the magazine’s snappers recently took 300 test shots in which Jones showed her cleavage and legs in an 18th-century French-boudoir setting, Hugh Hefner “passed on them because he expected much more nudity,” her husband/manager, Marty In gels, told us. “Shirley said, ‘Under no circumstances will I show more.’ And I agree with her. I mean, come on!” A Playboy rep didn’t get back to us.