ON THE heels of the 808 State pull-out, International Concert Promotion's Andrew Bull is looking to fry bigger fish, and it may be in the form of Eric Clapton. Clapton is touring Japan in October and, venue permitting, he could be booked here. With his fistful of Grammys and his huge Unplugged success, Clapton is packing them in on his worldwide tour. ''It will probably be a good old Eric Clapton show,'' Mr Bull said. ''Obviously, he is more hot now than he has been for years. He gets better with age. His audience just grows and grows.'' Clapton has performed in Hongkong twice, his most recent visit being in 1990 when he sold out the Coliseum. ''This guy could come here every two or three years and no problem,'' said Mr Bull. But despite Michael Jackson being played on ICP's telephone hold music (always a giveaway as to who is next on ICP's tour list), Bull is tightlipped about the ''Boy in the Bubble''. ''We like his music,'' he said ''but there is nothing announceable there.''