Related Clues:
- Prelude to an invention
- Pavarotti, for one
- It's just a thought
- Invention
- Lightbulb's meaning, sometimes
- Birth of a plan
- Creative concept
- Voice above a baritone
- Don Jose, in ''Carmen''
- Word with ''big'' or ''good''
- Vague impression
- Brain-picker's pursuit
- It might be crazy
- Something that might come to a head?
- Central significance