Related Clues:

• Abstraction
• It might make you say "Aha!"
• Invention inception
• The start of an invention
• Noodle concoction?
• Suspicion
• Bit of inspiration
• Light bulb, to Edison and comics
• Aftermath of a brainstorm
• Big or bright thing
• Brilliant thought
• Object of a brilliant thought
• The embryo of an invention
• Trial balloon, e.g.
• ''Hey, what's the big ___?''