Related Clues:

• Part of NASCAR
• 4-Down features
• Biography input?
• Pilot's setting, perhaps
• Singing hopeful's handout
• It can get into a jam
• Catwalk walkers
• It may be cut in a studio
• 21-Across, e.g.
• Prefix with mate or graph
• Floor sample
• It can be in a jam
• Self-starter?
• Mobile leader
• Type of insurance