Related Clues:

• Brit's ''Bye!''
• "Later, gator"
• Bye line?
• Thank you — thank you and goodbye!
• So long!
• Father, in Xhosa, and a nickname for 36-Across
• "I must be off, old chap"
• British "Bye-bye"
• Mobile message ender
• 'Later, y'all'
• ''Gotta run!''
• British "Bye-bye!"
• Repeated thanks given for so long
• Goodbye (colloq.)
• Thanks and cheerio