Related Clues:

• Rossini genre
• Price production
• ''Don Giovanni,'' for one
• Firefox alternative
• 77-Across is one
• Marx Brothers setting
• Wagnerian production
• ''Dido and Aeneas,'' for one
• Word with ''soap'' or ''grand''
• 33-Down's field
• "Orfeo," e.g.
• "Fidelio," for one
• Carmen or Aida
• 'Aida' is one
• 'Fidelio' or 'Faust'