Related Clues:

• Brain output
• It might come off the top of your head
• Metal-shell filling
• Boom cause
• Inventor's forte
• Contents of some shells
• Component of the explosive Torpex
• Brainy output
• Cause of some blowups
• Noodle output?
• Implosion material
• Boomsticks?
• Thinker's output
• Hit for 1-Across
• Its icon is a light bulb