Father Clarke is a priest.
Biography
After Dougal McGuire takes on Pat Mustard's job as the island's milkman following the latter's firing, Mustard places a bomb under the milk float that will go off if the vehicle goes under 4 mph.
Ted, Derek Beeching and Father Clarke formulate a plan to save him, one of which sees the priests saying Mass on a mobile altar as they pass the milk float.