The crossword solution for the term 'with one leg on each side of' is 'ASTRIDE'. This term is used to describe a person or animal that is standing with one leg on either side of an object, such as a horse. It is also used to describe a person who is straddling two objects, such as a fence or a chair. The term is derived from the Old English word 'stridan', which means to stride or stand with one foot on either side of something.