Related Clues:

• Command to Sweet Charlotte
• "Silence"
• Sibilant silencer
• Be silent
• 'Don't say a word!'
• Keep concealed, with 'up'
• 'Put a sock in it!'
• 'That's enough out of you!'
• ''Pipe down!''
• "Shh!"
• Comment on a library volume?: Var.
• Lullaby word
• It can fall over a crowd
• Breath-holding crowd reaction
• "Quiet, you!"