Related Clues:

• It's in your head
• Clever thought
• Mind matter
• Creative spark
• Just a thought
• Impulse
• Plan of action
• Lightbulb, in toons
• Light bulb for Wile E. Coyote?
• Novel thought
• Lightbulb, in comics
• Revelation
• 'Any ___?'
• It's a thought
• It may be bright or novel