Related Clues:

• Tournament helper
• 'Hasta luego!'
• Exiter's exclamation
• 'Ciao!'
• Ancient greeting
• See 25-Across
• ST
• 'So long!'
• 'See ya'
• 'Cheerio!'
• Forum greeting
• Opposite of 61-Across
• Greeting for Galba
• Pennsylvania ___
• 'Ta-ta!'