Related Clues:

• Talk socially without exchanging too much information
• Maw
• Opine wildly and indiscreetly
• Constantly flap one's gums
• "Gift" of a yakker
• Chat a bit
• Sound from a toy
• Clear up what the bigmouth is likely to do
• Father's gone to die
• Emit shrill sound, having twisted foot?
• Bark in quick sharp bursts
• Be garrulous
• Tie up the phone, e.g
• Chat and chat
• Chat on and on