Related Clues:

• Adjust, as a radio
• Whistler's quest
• Whistle a happy one
• Glee club selection
• What some people cannot carry
• Something to hum
• Ditty
• Turn a violin's pegs
• Prepare to play
• Lyricist's need
• Gershwin creation
• It may be carried with a guitar
• Jukebox selection
• Organized notes
• Adjust, as an engine