Related Clues:

• ''Nixon in China'', e.g.
• Become aware of
• Handel's ''Lotario,'' e.g.
• Haunt of a certain phantom
• One of five
• 6-Across, e.g.
• Work with a libretto
• Good reason
• Donizetti offering
• Reasonableness
• Taste or smell
• Know without knowing why
• Puccini presentation
• Logical thinking
• Phantom's mecca