Related Clues:
- ''It seemed like a good ___ at the time!''
- It's in your mind
- It may be bright or big
- "An __ is salvation by imagination": Frank Lloyd Wright
- Creative output
- Step one of an invention
- Mental inspiration
- Cranial bulb?
- "The very __!"
- Hassle, slangily
- Cartoon light bulb
- 'You have no ___'
- Creative inspiration
- Future invention
- What a germ may become