The crossword solution for the term 'Leave Laughing in the Aisles' is SLAY, which is a four-letter word. To 'SLAY' means to perform something so well that it leaves the audience laughing in the aisles. This phrase is often used to describe a particularly funny stand-up comedy routine or a hilarious movie. It can also be used to describe a great performance of any kind, such as a musical performance or a theatrical production.