Related Clues:
- "What's the big __?"
- Reason to shout 'Eureka!'
- Asset for an inventor
- You might bounce it off someone
- Hunch
- Innovative thought
- Creative notion
- It pops into the head
- Invention seed
- Patent seed
- Cause of an ''aha'' moment
- Brain output
- It might come off the top of your head
- Inventor's forte
- Brainy output