Related Clues:
- It might pop into your head
- Skull session result
- Coconut product?
- Black cloud : anger :: light bulb : __
- Brainy creation
- Inventor's brilliant notion
- Bit of brainwork
- Mental spark
- Light in the attic?
- Creative morsel
- Perfect short clue
- ''I had no __!''
- Hunch, say
- A lightbulb can represent it
- Gray matter matter