Related Clues:

• ''Un bel di,'' for one
• ''Toreador Song,'' e.g.
• Berg's 'Der Wein,' e.g.
• 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
• Pavarotti's solo
• "Summertime," e.g.
• Bocelli highlight