Related Clues:

• Derby entrant
• It's kept on track, hopefully
• One on the fast track
• Indy car, e.g
• Thin-bodied snake
• One active in the heat?
• Speedy one in Rolls-Royce?
• Driver doing 90, say
• Relay entrant
• Winner in posh car, no slouch
• One could be champion in a good car
• One who get moving with King-Ace-King
• First report on tree snake
• Bishop is stabling a champion horse
• Competitor has reviver first off