Related Clues:

• Quiet!
• 'Shut your word hole'
• ''Zip it!''
• Librarian's reminder
• 'Don't let them hear us!'
• License (anag)
• "Stop your yakking!"
• Volume control?
• "Cut out the racket!"
• 'Not a peep!'
• Quiet jail
• 'Stop talking!'
• Sounds like someone's giving order not to take statement in jail?
• Hush!
• "Too noisy!"