Related Clues:

• 33-Down's field
• "Orfeo," e.g.
• "Fidelio," for one
• Carmen or Aida
• Wagner composition
• 'Aida' is one
• 'Fidelio' or 'Faust'
• "La Boheme," e.g.
• "La Boheme," for one
• Rock or soap follower
• Horse ____
• Where the Marx Bros. spent the night
• Musical work that's often not in English
• ''Otello'', for example
• "Don Giovanni," for one