Related Clues:

• Piped up
• Said one's piece
• Joined the choir
• Tried out for "American Idol"
• Acted the stoolie
• Bicycle part
• Went caroling
• Ratted
• Was a fink
• Did a number
• Performed with the choir
• Blew the whistle
• Performed an aria
• Put one's two cents in
• Part of a wheel