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.

Category: RED SOX IT TO ME 
Clue: On April 20, 1912 the first game at this new venue went 11 innings & ended with a Red Sox win
fenway park

Category: MAD, I TELL YOU! 
Clue: In this film, Martin Balsam tells Anthony Perkins, "If it doesn't gel, isn't aspic"
psycho

Category: FOOD WORDS & PHRASES 
Clue: The name of this fast-growing fungus can also mean to grow or develop rapidly

mushroom