The term 'TRIPOD's Trio' refers to the three LEGS of a TRIPOD, which is a three-legged support structure used for stability in a variety of applications. The crossword solution for this term is 'LEGS', which is a four-letter word. Tripods are commonly used in photography, filmmaking, and other fields where stability is important. They are also used to support telescopes, surveying equipment, and other instruments.