Related Clues:

• "Carmen," for one
• "Toreador en Garde," from 63-Across
• "Salome" song
• 'Dite alla giovine,' e.g.
• "Tosca" tune
• Opera piece
• Pavarotti's field
• Number for one
• Met performance
• Sills song
• Dvorak's "Rusalka," e.g.
• Horse follower
• Gounod production
• "Tommy," e.g.
• Cantata tune