I can see that in 1861 1267/41/10, George gives Cork as his birthplace.
There are published trees with the information you give based on this baptism
14th October 1811 - St Mary’s Cork City
https://registers.nli.ie/registers/vtls000633154?locale=en#page/63/mode/1upParents George Clark and Margaret Hayes - a sponsor George Clark too.
Ancestry also shows, through the baptism records, baptisms for:
Henry Clark, 12th April 1807
Hugh Clark , August 1809
Elizabeth, 6th October 1821
You can look those up on the records if you wish to do so - sometimes sponsors are family members and can help in the wider search.
Of course, this may not be your man at all.