Related Clues:

• Fundamental part of whole
• Ingredient — small amount
• Operative part of an electric kettle
• Lead it (anag)
• Individual fact or feature
• It's a feature that the devil is in there most of the time
• Component — factor
• Is this what the old Greeks put in the kettle?
• It may be found on a table in science class
• Krypton, e.g
• Copper, e.g
• One of over 100 on a table
• Specification
• Feature alien in powerful chamber
• Water, perhaps, that's in a kettle