Tony Clarke spent quite a few years in the sport. I remember his team debut for West Ham at Wimbledon in the Knock-Out Cup quarter final replay on 14 August 1965, now immortalised as chapter 10 in that fine book, Speedway's Classic Meetings. For the rest of that year whenever he rode in the West Ham team, the Hammers never lost. He became a sort of lucky mascot.
He moved to Oxford in 1966, returned to West Ham in 1967 where he stayed until 1970. He then moved to Wembley in 1971, Newport in 1972, Wimbledon for the start of 1972 before going on to Wolverhampton later in the season, remaining there until 1975.
I'm not sure what happened to him after that, or where he is now.