SINEAD’S ATTITUDE: Sinead O’Connor is in the studio with N.W.A., recording a duet for the group’s upcoming album “Niggaz 4 Life.” The song title? It’s a profane play on the word “censorship.” . . . The irrepressible Morrissey, who has satirized everyone from gangsters to hairdressers, is now taking on the press. His new British single, “Our Frank,” has a B-side titled “Journalists Who Lie,” a new song inspired by various members of the Fleet Street trade. Morrissey’s new album, due out here April 16, is titled “Kill Uncle.” . . . And the Knack’s new single, “Rocket O’Love,” is getting off to a strong start with album-rock radio. The album, “Serious Fun,” is due out this week from Charisma Records, with such new tracks as “I Want Love,” “Can Tickle” and “River of Sighs.” The Knack album was produced by the ubiquitous Don Was, but he isn’t the only producer in the Was (Not Was) family. David Was is set to produce the new Rickie Lee Jones album.