Related Clues:
- Lightbulb's meaning, sometimes
- 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