The term 'Irishman' is often associated with a person of Irish descent, and the crossword solution 'CELT' is an appropriate descriptor for such a person. The term 'CELT' is derived from the ancient Celtic people who inhabited much of Europe, including Ireland, during the Iron Age. Thus, the term 'CELT' is an appropriate description for an Irishman, as it refers to the cultural heritage of the Irish people.