The term 'NARC'S FIND, PERHAPS' is a crossword clue that can be solved with the answers KILO (4 letters) and LSD (3 letters). KILO is a slang term for a kilogram, which is a unit of mass in the metric system. LSD is an abbreviation for lysergic acid diethylamide, a powerful hallucinogenic drug. Therefore, the answer to the crossword clue 'NARC'S FIND, PERHAPS' is KILO and LSD, as these are items that a narcotics officer might find during a drug bust.