Related Clues:
- Object of a brilliant thought
- The embryo of an invention
- Hit on the noggin
- Trial balloon, e.g.
- Outer layer
- ''Hey, what's the big ___?''
- ''The Law West of the Pecos''
- Gray matter creation
- Patent basis
- Content of cognition
- ... and another
- Think box
- ''What's the bright ___?''
- Asset for an entrepreneur
- Result of cogitating, perhaps