The crossword solution for the term 'winning sign' is VEE, which stands for victory. VEE is a common symbol used to represent success or victory in many contexts, such as sports, business, and politics. It is often seen in the form of a V-shaped hand gesture, which is used to signify victory or success. Additionally, it is also used in the form of a flag or banner, which is often seen at the end of a race or competition.