The crossword solution for the term 'Mr. Potato Head PAIR' is 'EARS', which is a four-letter word. Mr. Potato Head is a popular toy created by Hasbro in 1952. The toy consists of a plastic potato with various removable parts, such as eyes, ears, noses, and mouths, that can be rearranged to create different facial expressions. The 'PAIR' in the term refers to the two ears that are included with the toy.