Related Clues:

• In la-la land
• Under the covers
• Out of it
• Lying, maybe
• Still under cover
• Already retired
• Unwell, perhaps
• Emulating a sleepyhead
• Undercover?
• Napping, so to speak
• Tucked in
• Uninformed
• Under cover?
• Retired for the night
• Tucked in for the night