Related Clues:

• Surprise party admonition
• Theater admonition
• Be quiet
• Library order
• The sound of ''Silence!''
• 'Quiet, please!'
• Librarian's warning
• ''Put a lid on it!''
• Librarian's admonition
• ''Quiet!''
• 'Be quiet!'
• 'Zip your lip!'
• Recital rebuke
• Audience utterance
• "Pipe down!"