Related Clues:

• Decrease in intensity
• Keep concealed, with 'up'
• Slack off
• 'Put a sock in it!'
• 'That's enough out of you!'
• ''Pipe down!''
• Diminish in intensity
• "Shh!"
• Lose intensity
• Lullaby word
• Grow less
• It can fall over a crowd
• Breath-holding crowd reaction
• "Quiet, you!"
• Make less intense