Related Clues:

• Smog soils it
• Oven fuel
• Fill-up fluid
• Put on the radio
• Roadsign, perhaps
• Beetle juice
• Car feature
• Beetles go nowhere without it?
• Put on the tube
• Flat's need
• Keep from getting too close, with "out"
• Empty blather
• Stomach problem
• With 76-Down, harmonica feature
• Basketball filler