Related Clues:

• Met piece
• ___ cantabile (gentle, smooth song)
• "Toreador en Garde," from 63-Across
• "Salome" song
• 'Dite alla giovine,' e.g.
• "Tosca" tune
• Opera piece
• Number for one
• Sills song
• Cantata tune
• Song for Madama Butterfly
• Part of a score
• 'Moonlight,' e.g.
• 1997 Andrea Bocelli album
• Diva's offering, maybe