MOVE over Michael Jackson. For someone else is ready to play Hongkong even if Jacko can't. Step forward tennis playing, Bible thumping pop star Cliff Richard, who has been in the business since time immemorial - and some say even longer. The Peter Pan of Pop who can still roll out the hits and fill up the stadia in Britain at the age of 52, is due to perform at the Academy for Performing Arts in early September in a concert being organised by the Social Welfare Department. Slated in the early days as Britain's answer to Elvis Presley, the veteran of the charts has outlived all pretenders to his undisputed title as Britain's most enduring pop star. And he hasn't finished. Last month he was on MTV saying he will go on and on because pop is the only business he knows. We're sure Hongkong won't be complaining.