Related Clues:

• Nose noise
• Show boredom
• Indicator of a dull speech?
• Bedtime distraction
• Exhibit ennui
• Sign of fatigue
• Produce Z's
• 'When is this thing over?'
• Nighttime annoyance, maybe
• Be noisy at night
• Noise at night
• Open wide?
• Dull thing, in slang
• Go ''ZZZ!''
• Sing & ___ Ernie ("Sesame Street" doll)