Related Clues:

• "Silence"
• Be silent
• 'Don't say a word!'
• ''That's enough!''
• Keep concealed, with 'up'
• 'Put a sock in it!'
• 'That's enough out of you!'
• Restraining order?
• ''Pipe down!''
• "Shh!"
• Lullaby word
• "Enough of that!"
• It can fall over a crowd
• Breath-holding crowd reaction
• ''Zip your lip!''