Related Clues:

• With 16-Across, places to pull over
• Take a nap
• Insomniac's lack
• Vacation plan
• Inactivity
• Part of R & R
• Take a siesta
• Sack out
• Medical advice, often
• Take ten
• Hypnotist's word
• Prescription for stress
• Everything else
• That left over
• Silence of the staff