Related Clues:

• It can be big, bright, good or bad
• Comic lightbulb
• Lightbulb source?
• Birth of a notion
• Bocelli's pitch
• Noodle product?
• Abstraction
• It might make you say "Aha!"
• ___ sax
• Saxophone range
• Invention inception
• Pinkerton, in 'Madama Butterfly,' e.g.
• Bocelli, for one
• The start of an invention
• Four-part harmony part