Related Clues:

• Pre-takeoff cry?
• Short farewell
• Bye that's bid
• Word accompanying a wave
• "Bye now"
• Farewell, in 19-Across
• 'Peace'
• "Arrivederci!"
• Toulouse "Toodle-oo"
• Continental farewell
• "Till we meet again"
• Casual farewell
• "Farewell, mon ami"
• "Goodbye, cheri"
• Conversation ender