Related Clues:

• Hush
• Theater request
• 'Quiet down!'
• 'Zip it!'
• 'I don't want to hear it!'
• "Hush!"
• Librarian's plea
• 'Shut your mouth!'
• Library imperative
• Command to Sweet Charlotte
• "Silence"
• Be silent
• 'Don't say a word!'
• ''Be still!''
• Keep concealed, with 'up'