Related Clues:

• 'Of all the noises known to man, ___ is the most expensive': Molière
• "Tosca" or "Pagliacci"
• "The Magic Flute," for one
• Horse trailer?
• "Don Giovanni," for example
• 'Turandot,' e.g.
• It may be comic
• "Porgy and Bess," for one
• 'The Makropulos Affair,' for one
• ''Falstaff'' or ''Otello''
• "Dido and Aeneas," for one
• Music drama
• Tough "Jeopardy!" category
• Where airs are aired
• Word with soap