Related Clues:

• Budding plan
• Writer's block buster
• Potential solution
• It may be fixed or bright
• Sudden realization
• Cerebral spark
• Inventor's "lightbulb"
• Light bulb, symbolically
• The very beginning of an invention
• 'Hey, what's the big ___?'
• Mind flash
• Creative input
• Sudden bright thought
• Lightbulb in toons
• Fresh thought