Related Clues:

• Consideration
• Cerebral output
• "Why, the very ___!"
• Invention beginning
• It can be big, bright, good or bad
• Mental nuggets
• Comic lightbulb
• They're all in your head
• Lightbulb source?
• Birth of a notion
• Noodle product?
• Abstraction
• It might make you say "Aha!"
• Invention inception
• Thoughts