Related Clues:

• [Excuse me, this is a library ...!]
• 'Quiet, the show's starting!'
• 'That's a secret!'
• Racket dampener?
• Quieten down!
• Quiet, silence
• (Finger on lips)
• "Stop talking"
• "Quiet you!"
• Sound before the orchestra begins
• "The baby is sleeping!"
• "Can't you see this is a library?!"