Related Clues:

• Gallop easily
• 10K or marathon
• Beat quickly, as a heart
• Meadowlands race
• Career
• See 24 Down
• Boston Marathon, e.g.
• Indy 500, for example
• Instruction at a horse show
• Beat too fast, like a heart
• Compete at Indy
• Emulate Jeff Gordon
• Submit, with ''out''
• Talladega 500, e.g.
• Go like a shot