Related Clues:

• Chemical in some poisons
• Fang fluid
• Snake venom, for example
• Cashew family member
• Make poisonous
• Cashew cousin
• Spy movie poison
• Blight
• It's detected by the Marsh test, in forensics
• Plague cause
• As, in formulas
• Cause of one's undoing
• Anathema
• Rudely brief
• Spider-Man foe