Related Clues:

• 77-Across is one
• Soapy froth
• Soap and water creations
• Marx Brothers setting
• Bubble bath's tubful
• Wagnerian production
• Beer features
• ''Dido and Aeneas,'' for one
• Word with ''soap'' or ''grand''
• 33-Down's field
• "Orfeo," e.g.
• "Fidelio," for one
• Carmen or Aida
• Wagner composition
• 'Aida' is one