Related Clues:

• Respond to a bumper sticker, perhaps
• Volume unit?
• Leaflet leaf
• Sound from a jam
• General character
• Musician's concern
• Skin ___
• Earth __
• Dial ___
• Errand boy
• See 112-Down
• La or fa
• Senate runner
• Show impatience in a traffic jam
• Play on pipes, palindromically