Related Clues:

• ''Tosca'' solo
• 'Votre toast,' for one
• ''Macbeth'' excerpt
• Solo by Sills
• ''Otello'' piece
• 45-across selection
• Song for 63 Across
• Operatic number
• ''Messiah'' melody
• Big moment at La Scala
• "Elsa's Dream," for one
• Covent Garden number
• "Bess, You Is My Woman," e.g.
• Bocelli performance, perhaps
• Mezzo's big moment