Related Clues:

• Act the fink
• Blab freely
• Hootenanny, e.g.
• Let the air out?
• Belt, perhaps
• Melodize
• Croon a tune
• Attempt a number
• Belt it out
• Talk, in a way
• Perform a 36-Down
• Prove one can carry a tune
• Vocalize
• One way to make a joyful noise
• ''Of Thee I ___''