Related Clues:

• Type of pressure
• Inner-tube innards
• Gas-station freebie
• Walkman, perhaps
• Hopefully, it's fresh
• Sound medium
• Bubble contents
• Plane peril, ___ piracy
• Refrain
• Go for a drive
• What you breathe
• It's in circulation
• Plane's place
• Fred Allen's medium
• Take the roadster out