Related Clues:

• Sax range
• The light bulb, to Edison
• "The very ___!"
• Gigli, e.g.
• Flash of brilliance
• Postulation
• Creative thought
• It may be seminal
• Basic idea
• Thesis basis
• Fanciful notion
• Brainstorming session result
• Tone
• Bean concoction?
• "Ah-ha" predecessor