Related Clues:

• Day part
• See 17 Across
• Cuckoo announcement
• Zero ___
• Chunk of time
• Word with ''rush'' or ''happy''
• Customary time
• Happy __
• Appointment-book line
• Frequent TV episode length
• Datebook section
• Siesta time
• "The __ of departure has arrived": Socrates
• Little-hand indication
• Attorney's billing basis