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: HEY, "D.J."
Clue: James Buchanan Brady's gem of a moniker

SOLUTION: diamond jim

PROBLEM: Category: THIS "BUD"'S FOR YOU
Clue: It's the practice of pairing swimmers, with each responsible for the other's safety

SOLUTION: the buddy system

PROBLEM: Category: 1983: THE YEAR IN ENTERTAINMENT
Clue: Its ensemble cast included Kevin Kline, Glenn Close & William Hurt

SOLUTION:
the big chill