Related Clues:

• Library no-no
• Static, e.g.
• Breathe stertorously
• Prove you are asleep
• Dorm annoyance
• Dissonance
• Saw wood at night?
• Temporary breathlessness
• Sleeper's difficulty
• Annoying night noise
• Saw wood
• It may take your breath away
• Keep someone awake, maybe
• Sound of slumber
• Urban pollutant