RADIO

Capital Cities-ABC will buy out the remainder of Chicago disc jockey Larry Lujack’s 12-year, $6-million contract in exchange for an agreement that bars him from working for competitors, the Chicago Sun-Times reported Wednesday. Lujack, 47, signed the contract in 1984. He once had an audience estimated at more than 1 million a week; the latest Arbitron radio ratings put his own in 18th place in the Windy City.