The crossword solutions for the term 'WIND IT UP' are END, which is a three-letter word. The phrase 'wind it up' is often used to describe the act of winding something up, such as a clock or a toy. It can also be used to describe the act of winding up a conversation or an activity. The word 'END' is the perfect solution for this phrase, as it implies that the winding up process has been completed.