The term 'USE A SCYTHE' is composed of three crossword solutions: HEW (3 letters), REAP (4 letters), and MOW (3 letters). HEW means to cut or chop something down with an axe or other tool. REAP means to cut down and gather a crop of grain or grass with a scythe or sickle. MOW means to cut down grass, grain, or other crops with a scythe or machine. All three words refer to the use of a scythe, which is a long-handled tool with a curved blade used for cutting grass, grain, and other crops.