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.

Category: WINE 
Clue: The Douro Valley in this country is an important port producer
portugal

Category: CROSSWORD CLUES "D _ _ _ ER" 
Clue: Macbeth thought he saw one
a dagger

Category: FAIRIES 
Clue: This mischievous fairy speaks the epilogue of Shakespeare's "A Midsummer Night's Dream"

puck