Water ski eh amp ion ! withdrawsCHERTSKY, Eng/and (CP) — Canada will be without lt;3pfor.ding men's champion Joel McClintock when ihe preliminary competition of Ihe world walerskiing championship begins today.MeCUulonk, of Toronto, withdrew from ihccoinpcLi-Mon Wednesday after finding he com Id nnL perform without extreme pain from Injuries suNerrd at a coin-petition In Texas Iasi morilliThe 20-year-old former Canadian champion has a small crack in his pelvis and torn muscles in his hip. lie had tried In defend his Canadian title two weeks ago in Kelowna, R.C.% buL could only compete in one ui Ihree events and lost the crown to Bruce Reid, 22, of Winnipeg.Canada and Britain are expected tu give tujgh etisil-lenges to the United Slates for the over-all l earn liLlo, which llie U.S. has won at all 115 world championships.