Related Clues:

• Roller in a pit
• Auto
• Mercury, but not Mars
• Elevator ___
• It can get into a jam
• Game show prize, sometimes
• 21-Across, e.g.
• Prefix with mate or graph
• Means of transport
• Suspended ride
• Truck compartment
• Commuter's conveyance
• Omni add-on
• Mountain climber?
• Rail runner