Related Clues:

• Serpent
• Drain opener
• Asp or adder
• Soapmaking ingredient
• Caustic alkali
• Caustic matter
• Clog clearer
• Eden figure
• Cobra or python
• Alkali in cleansers
• See 16 Down
• River flowing from Yellowstone National Park
• Dastardly sort
• KOH, to a layperson
• Gem State stream