Related Clues:

• Busy time for fireflies
• Sack time
• When many people retire
• Day follower
• Dracula's waking hours
• Word with club or stick
• When bats fly
• Dracula's time
• Dusk-to-dawn period
• See 6 Across
• See 21 Across
• Dracula's shift
• "What hath __ to do with sleep?": Milton
• Star's time to shine?
• Cap or gown lead-in