Related Clues:

• Cheerio
• Bye-bye
• Friendly greeting
• Honolulu greeting
• "Au revoir!" relative
• "So long!"
• Bye, somewhere
• It's said when taking off
• 'See you later!'
• Ciao cousin
• Maui greeting
• Honolulu "toodle-oo"
• Ciao, in Chartres
• Hilo hi
• Farewell, to 10-Across