Half a pair is a phrase used to describe something that is incomplete or missing its other half. It is often used to refer to a single item of clothing, such as a glove, shoe, or sock, that has been separated from its pair. The term can also be used metaphorically to describe a situation in which two people or things are not together, such as a couple that has broken up or a missing piece of a puzzle. The crossword solution for the term Half a Pair is ONE, with three letters.