Related Clues:

• Opera hero, often
• Vibe
• Approximation
• Creative germ
• It may come to mind
• What comes to mind
• Pavarotti, notably
• "What's the big ___?"
• Light bulb, in a cartoon
• Central idea
• Awareness
• Cerebral output
• "Why, the very ___!"
• Jan Peerce, e.g.
• Invention beginning