Related Clues:

• See 18-Across
• Darn it
• Certain muscle injury
• Humans, e.g.
• See 15-Down
• Mar, in a way
• Drop of sorrow
• Floor it
• Kentucky Derby, e.g.
• Regatta, for example
• NASCAR event
• It may have four legs
• Jag
• Horse's pace
• Rend