Related Clues:

• Fall-back time?
• Late hour
• Possible starting time for a rave
• Late hr.
• Bedtime hr. after a late date, perhaps
• Last-call time, maybe
• Bar closing time, often
• Two bells, on the middle watch
• Graveyard shift hour
• When some bars close
• Two bells, at sea
• When daylight saving begins: Abbr.
• Bar closing time, perhaps
• Sixty past midnight
• Common time for 38-Across