Related Clues:

• Period of quiet
• "Use your inside voice!"
• 'Quit your crying!'
• Sound from a silencer
• "No more talking!"
• Lullaby opener
• 'I've had it up to here!'
• ''I've had it!''
• ''Keep quiet!''
• One may fall over a crowd
• As much as necessary
• Restraining order
• Impose quiet
• 'Be still'
• Awed crowd response