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 consistency, answers should be in all lower cased letters.
PROBLEM: Category: E BEFORE I 
Clue: Hold your horses! & to make it easier, use these straps that attach to the bit of the bridle

SOLUTION: reins

PROBLEM: Category: BRITISH SPELLING BEE 
Clue: At the pub, it's beer from a keg, not a bottle

SOLUTION: d-r-a-u-g-h-t

PROBLEM: Category: THE MALE OF THE SPECIES 
Clue: When male badgers & pigs get together, the females think they're  a bunch of these

SOLUTION:
boars