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 simplicity, answers should be in all lower cased letters.

[Q]: Category: POTPOURRI
Clue: This chess piece that usually looks like part of a castle is sometimes called a castle
[A]: rook

[Q]: Category: LOOK OUT "BELL"OW
Clue: As one word, it's a plant also called deadly nightshade; as 2 words, a Stevie Nicks album
[A]: belladonna/"bella donna"

[Q]: Category: STABLER
Clue: Carboxymethyl cellulose & locust bean gum make this cold, sweet treat more stable
[A]:
ice cream