Related Clues:

• Think-tank nugget
• "I have an __!"
• Head start?
• It can be half-baked
• It might be harebrained
• Entrepreneur's need
• "The very" thing?
• "Now there's an ___!'
• The origin of an invention
• "The very ___!" ("What nerve!")
• Light bulb, in a comic strip
• 'Aha!' elicitor
• Flash of sorts
• Fleeting desire
• Strip light bulb?