Last seen in:
Related Clues:
- Warning that often precedes 17-, 30-, 49- and 65-Across
- Gag order?
- 'Not a word!'
- 'No noise!'
- Theater sound
- Theater reproof
- "Quiet down!"
- Silencer's sound
- Librarian's rebuke
- A sound for silence
- 'Stop chewing on that goddamn apple
- Finger-to-lips sound
- 'Put a cork in it!'
- 'I'm trying to watch 'The Force Awakens' here, shut up!'
- 'Ahem' subtext, maybe