Related Clues:

• Strong feeling
• "It seemed like a good ___ at the time!"
• Cerebral achievement
• Creative start
• Bean sprout?
• Brainstormers' goal
• 'What's the big --?'
• It's all in your head
• It has a germ
• Brain trust offering
• Vision
• The light bulb, to Edison
• "The very ___!"
• Flash of brilliance
• Postulation