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: COLORFUL LANGUAGE 
Clue: A karate kid may aspire to this high rank, kuroi-obi in Japanese

SOLUTION: a black belt

PROBLEM: Category: SPORTS RULES, MAN! 
Clue: In this track & field event, a 45-meter-long runway can front a 9-meter-long moistened sandpit

SOLUTION: long jump

PROBLEM: Category: CHEERS 
Clue: Put the lime in the rum & Coke & drink it all up under this Spanish name

SOLUTION:
a cuba libre