Related Clues:

• So long returning at first and at last
• ''Bye now!''
• "Later," in London
• 'Laters'
• 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
• "Hasta la vista"
• ''Gotta run!''