Related Clues:

• Entrepreneur's starting point
• New thought
• Reason to shout "Eureka!"
• "Hey, what's the big ___?"
• Invention inspiration
• Flash in the brainpan
• Shortage when stymied
• ''Any __?''
• Certain germ
• Cranial output
• Mental invention
• Bright thing?
• Seeds of a sort
• "Whose bright ___ was this?"
• Crossword constructor's germ