Related Clues:

• Bob Seger "I know it's late, I know you're ___"
• '04 Willie Nelson song to sleep to?
• One in seven likely to crash?
• Tried syncopated beat
• There's no rest for them
• Doc's pal
• Nearly out?
• Agent commandeers shelter for dwarf
• Physically or mentally weary
• Weary, tried anyway
• Nodding off, maybe
• Out of gas, so to speak
• Note 500 bottles Inland Revenue taxed
• What Beatles are on 36-Across
• Like many a new parent