I located Phelan’s Lane on an Ordnance Survey Map of Clonmel. The map was produced between 1888 and 1913. Phelan’s Lane is located just north of O’Connell Street and just west of Gladstone Street. Phelan’s Lane is in the approximate center of the map. You’ll have to look closely at the map, as Phelan’s Lane is very narrow, and narrows even further as it heads south into O’Connell Street. See the map at: https://bit.ly/3bU8MZf
Phelan’s Lane, Clonmel, was still extent in the early 20th century, as the 1901 census shows 10 households located there. See: http://www.census.nationalarchives.ie/pages/1901/Tipperary/Clonmel_West_...
By the 1911 census of Clonmel, there were 7 households located in Phelan’s Lane: