The term WOUND UP OR WOUND DOWN can be summarized by the crossword solution 'ENDED, ' which is a five-letter word. This term refers to winding something up or winding something down, which means to increase or decrease the tension of an object, such as a spring or a clock. Winding something up increases the tension, while winding something down decreases it. In this context, 'ENDED' implies that the winding process has been completed, either up or down.