Related Clues:

• Do lullabies, e.g.
• Material for some skirts
• Wimbledon surface
• Rye, for one
• Perform 2-Down
• Join the choir
• 4 Down material
• Perform with a choir
• Police informer
• When doubled, a New York prison
• Perform on 'American Idol,' e.g.
• Take the mic
• Do some karaoke
• Emulate Justin Bieber
• Rat on the Mob