The striker is out of contract after his deal at Palace expired and has been linked with Coventry City, Iain Dowie's QPR and Reading.
Said Neil Warnock to the South London Press: "Clinton has not accepted our offer so it's no longer on the table. "I assume he must have found himself a new club,"
Ray Ranson has already admitted that City are still in negotiations with representatives of the former Birmingham City player who has international experience with the Republic Of Ireland.