Related Clues:

• Good job!: international radio code word
• Operagoer's shout
• Audience's joyful shout
• Great British PM in Australia promoting queen
• Encouraging cheer
• Well done, coming ahead of Charlie!
• Congratulations for assassin
• Crowd's cheer for a diva
• Exclamation that's also the name of a cable channel
• Opera house exclamation
• International Call Sign: appreciation shown at the opera
• "Great performance!"
• Cheer heard at the opera
• Relative receives top grade — very well done!
• Cheer for Callas