Related Clues:

• Slangy ''so long''
• "See ya"
• "Till next time"
• Casual goodbye
• 'See ya --!'
• In a little while
• ''I'm off!''
• Not as timely
• Kid's response to 20-, 37- and 55-Across
• Delaying response
• Subsequent
• "See ya!"
• Less punctual
• 'Peace!'
• Afterwards