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: SO GREAT THEY NEED 2 NICKNAMES 
Clue: By career's end Wayne Gretzky was "The Great One"; earlier he was this, also a Chaplin film title

SOLUTION: "the kid"

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: NATIVE AMERICANA 
Clue: The name of this soft leather Native American shoe comes from an Algonquin word

SOLUTION:
a moccasin