Related Clues:

• It may be bright or big
• "An __ is salvation by imagination": Frank Lloyd Wright
• Creative output
• Step one of an invention
• Mental inspiration
• Crater creator, perhaps
• Blasting agent
• Cranial bulb?
• Letters of discharge
• 'The -- Cometh'
• Razer's edge?
• NASCAR race airer
• Powerful stuff
• String
• "The very __!"