TASK DEFINITION: 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.
PROBLEM: Category: HAY IS 
Clue: ...Animal fodder made from cereal grasses like this one, also the first name of the current treasury secretary

SOLUTION: timothy

PROBLEM: Category: PLAYBILL 
Clue: This musical's "American Dream" ended on B'way after 4,097 performances--& a lot of helicopter flights

SOLUTION: miss saigon

PROBLEM: Category: HOUSE OF METAPHORS 
Clue: Jesus said the temple has been turned into one of these "of thieves"

SOLUTION:
a den