Related Clues:

• Word with race and queen
• Make a somnolent sound
• [Ho-hum]
• See 34-Down
• Snooze stentorianly
• Drop off for a bit
• Sound from a sleep lab
• Sleep disturbance
• Source of tedium
• Bother one's bedmate
• Make a little 'night music'
• Sack sound
• Clock radio button
• Hint to an unexciting speaker
• 'Zzzzzz ...'