Related Clues:

• Reading position, often
• Reading position, sometimes
• "___ as a bug in a rug"
• All warm and cozy
• Like most people in the middle of the night
• Close-fitting
• Retired, in a way
• Like Frere Jacques
• Nice and cozy
• Down for the night
• Very comfortable
• Like contented bugs?
• Not yet awake
• Still in the sack
• Nestled