Related Clues:

• Radar measurement
• Word with course or horse
• Scurry
• 10K, for one
• Type of horse
• Spider's parlor invitee
• One may be on its last leg
• Marathon
• Put your foot down, in a way
• Violate the law, in a way
• Subspecies
• Ascot event
• Cannonball
• "Chariots of Fire" highlight
• 5K or 10K