Related Clues:

• "Nixon in China," e.g
• ''Macbeth'' or ''Otello''
• 'Der Rosenkavalier,' for one
• Verdi production
• Boito's 'Mefistofele,' e.g
• "The Tempest" or "Otello"
• 'Orfeo,' e.g
• "Aida," for one
• Phantom's haunt?
• 'Fidelio,' e.g
• ''The Magic Flute,'' for one
• Works with potential spouse
• Where workers may sing for their supper
• Gluck composition, e.g
• Alternative to opera