Related Clues:

• Journal unit
• See 25-Across
• See 6-Down
• Second of two
• When it's light
• Time piece?
• See 39-Across
• New Year's ___
• Time period
• Word repeated before 'in' and 'out'
• See 10-Down
• Time unit
• It breaks every morning
• It's close is signaled by 4-Down
• Certain trader