Related Clues:

• Birth of a plan
• Creative concept
• Word with ''big'' or ''good''
• Vague impression
• Brain-picker's pursuit
• It might be crazy
• Something that might come to a head?
• Imagine that
• Productive thought
• One may be big or bright
• ''The very ___!'' (''What nerve!'')
• Light bulb, to a toon
• 'No ___' ('Beats me')
• Invention impetus
• "The very" thing