Related Clues:

• What the fat lady sings
• Diva's moment
• ''Un bel di,'' for one
• ''Toreador Song,'' e.g.
• Berg's 'Der Wein,' e.g.
• Watchdog breed
• Part of a libretto
• An air from ''Aida''
• Pons song
• Operatic song
• Opera highlight
• ''Celeste Aida,'' e.g.
• Callas selection
• *Opera ... coloratura ... 'Eri tu'
• Pavarotti specialty