The term 'SORT OF SHOE' can be broken down into two crossword solutions, 'PUMP' and 'OVER'. A PUMP is a type of shoe that is typically characterized by a low-cut front, a closed back, and a heel that is usually higher than the toe. They are often made of leather or suede and have a strap across the top of the foot. An OVER shoe is a type of shoe that covers the entire foot and is usually made of rubber or plastic. It is designed to protect the feet from water, mud, and other elements.