Related Clues:

• Leader
• Side one is a cocktail
• Part of NASCAR
• Train unit
• Biography input?
• Pilot's setting, perhaps
• '___ my day!'
• Train part
• Intrepid, e.g.
• Auto
• Mercury, but not Mars
• Elevator ___
• It can get into a jam
• Game show prize, sometimes
• 21-Across, e.g.