Related Clues:

• Inventor's brainchild
• Mental creation
• Thought hidden in eight long puzzle answers
• 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!''
• ''The very'' item
• Prelude to an invention
• It's just a thought
• Invention