Related Clues:

• Prate
• Talk idly
• Talk and talk and talk
• Talk on and on
• Idle talk
• Talk nonsense
• Teeth do it
• A lot of foreign intelligence intercepts
• Be a chatterbox
• Yap
• Talk on and on, and a hint to the three-letter starts of 16-, 22-, 43- and 51-Across
• Talk noisily
• Say 'Hey, batter batter batter' and such
• Talk fast
• Talk quickly and indistinctly