Related Clues:

• Half or fast condition
• Down for the night
• Numb
• Not yet awake
• Bad way to be at the wheel
• Bad thing to be at the wheel
• Still in the sack
• Still snoring
• With "slug," a lazybones
• Horizontal, perhaps
• Under covers
• Like many sleepers
• Resting, say
• Zonked out
• All tucked in