Related Clues:

• The sound of ''Silence!''
• 'Keep it under your hat!'
• Closely confined
• 'Quiet, please!'
• 'Shush!'
• Librarian's warning
• ''Put a lid on it!''
• Librarian's admonition
• ''Quiet!''
• ''Enough!''
• 'Be quiet!'
• 'Zip your lip!'
• Recital rebuke
• ''Shut up!''
• Shout to someone with a blindingly bald head?