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: THE GENTLE ART OF RUGBY 
Clue: This position is the last line of defense; in the NFL it's the offensive role of Larry Csonka & Moose Johnston

SOLUTION: the fullback

PROBLEM: Category: LETHAL WEAPONS 
Clue: In the largest man-made explosion in history, the USSR detonated a 50-megaton one of these in 1961

SOLUTION: a hydrogen bomb

PROBLEM: Category: POTPOURRI 
Clue: Snaketown on the Gila River in this state is the best-studied village of the Hohokam culture

SOLUTION:
arizona