His regular position was as a forward. He played for Neilston, Bootle, Glasgow Thistle, Newton Heath and
Neilston-born Clarkin signed for from Newton Heath in June 1896. He made his debut for the club in their first-ever match in the Football League, on 5 September 1896 (see Football Club season 1896-1897).
He went on to appear in 28 of the club"s 30 games that season, scoring eight goals.
The following season, 1897-1898, Clarkin made 26 appearances and scored five goals.