Related Clues:

• Marathon, e.g.
• Word with course or horse
• Scurry
• 10K, for one
• Type of horse
• One may be on its last leg
• Marathon
• Subspecies
• Ascot event
• Cannonball
• "Chariots of Fire" highlight
• 5K or 10K
• Beat fast
• Compete against the clock
• Meet segment