You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.
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Question: Category: A FASHIONABLE CATEGORY 
Clue: Feline name for the full-body stocking made popular by Diana Rigg on "The Avengers"

Answer: a catsuit


Question: Category: WHAT SIGN ARE YOU? 
Clue: You're a 7' tall red octagon with white letters; you tell folks to do this, & dang it, you mean it

Answer: a stop sign


Question: Category: SUBATOMIC PARTICLES 
Clue: One proton makes up over 99% of the mass of an atom of this element, 2 of which are found in water

Answer:
hydrogen