Related Clues:

• "Why, the very ___!"
• Invention beginning
• It can be big, bright, good or bad
• 'Terrif!'
• Comic lightbulb
• Large, in commercial lingo
• Lightbulb source?
• 'Terrific!'
• Birth of a notion
• Noodle product?
• Abstraction
• It might make you say "Aha!"
• Big, in combinations
• Incomparable
• "Amazing!"