Related Clues:

• Tony-toting Tommy
• It's whistleable
• Catchy thing?
• Work on, as an engine
• Get ready to play, say
• Something to sing along to
• Ensure that a G is actually a G, say
• Adjust the piano
• Use a fork, in a way
• Adjust, as a lute
• Balladeer's rendition
• Simple number
• Composer's piece
• Make less sharp, maybe
• Catchy item, perhaps