Leg Extension is a term used in physical therapy and exercise to describe a type of stretching exercise. It involves extending the leg outwards from the body while keeping the knee straight. This exercise is often used to help improve flexibility, balance, and range of motion in the lower body. The crossword solution for this term is STILT, which is a device used to raise the height of a person or object. Stilts are commonly used by performers, such as circus clowns, to increase their height and perform stunts.