Related Clues:

• Be quiet
• See 41-Across
• Knock out, in a way
• You might take it lying down
• Depend
• Veg out
• Catch one's breath
• Use a hammock
• Take a breather
• Word with bed or chin
• Stop on the way
• Doctor's advice, perhaps
• Take a snooze
• Come to a halt
• Get some shuteye