Related Clues:
- Inventor's first step
- Start of a plan
- A good one may come to mind
- Brain flash
- Creative flash
- Inventor's spark
- It starts with a germ
- Reason to shout ''Eureka!''
- They might be bounced off others
- 'An invasion of armies can be resisted; an invasion of ___ cannot be resisted': Hugo
- ''The very'' item
- Prelude to an invention
- It's just a thought
- Supposed
- Invention