The term 'TURN ON A STOOL' can be summarized by the crossword solution 'SWIVEL', which is a 6-letter word. Swiveling is a type of movement in which an object or person rotates around a central point. In this case, the object being turned is a stool, which is a type of seat that typically has four legs and no back or armrests. The act of turning on a stool involves rotating it around its central axis, allowing the user to face different directions while seated.