The crossword solution for the term VIGOR, ON MUSIC is BRIO, which is a four-letter word. BRIO is a musical term that refers to a lively and spirited style of playing or singing. It is often used to describe music that is full of energy and enthusiasm. Vigor, on the other hand, is a term that is used to describe strength and vitality. Therefore, the combination of these two terms can be used to describe music that is full of energy and enthusiasm, as well as strength and vitality.