Related Clues:

• Rest stop sight
• Biography input?
• Eighteen-wheeler
• Pilot's setting, perhaps
• High roller?
• Game before the finals
• Conductor's starter?
• Long hauler
• It can get into a jam
• 21-Across, e.g.
• Prefix with mate or graph
• Trucker's wheels
• It can be in a jam
• Trucker's transport
• Showroom display