Irish lad gone wrong (7)
I believe the answer is:
donegal
'irish' is the definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?
'lad gone wrong' is the wordplay.
'wrong' is an anagram indicator.
'lad'+'gone'='ladgone'
'ladgone' is an anagram of 'DONEGAL'.
Can you help me to learn more?
(Other definitions for donegal that I've seen before include "County of NW Ireland" , "Lean dog (anag) - Irish county" , "town and county" , "part of Ireland" , "Irish town" .)