Related Clues:

• Crash, so to speak
• It was azure-lidded, to Keats
• Not pay attention
• Rest
• Nod off
• Skins
• Nod
• Sore labour's bath, to Shakespeare
• See 28-Down
• Sleep
• Nap
• Drop off
• Result of counting sheep
• Conk out
• Catch some Z's