Related Clues:

• Beat fast, as a heart
• Le Mans event
• Entered Indy
• 10-K, for one
• See 59-Down
• Ran swiftly
• Competition
• Hustled
• Go lickety-split
• Track and field activity
• What hearts sometimes do
• Election contest
• Really moved
• Move quickly
• "Seabiscuit" nail-biter