Somewhere in Ireland, good to go with colleen? (7)
I believe the answer is:
donegal
'somewhere in ireland' is the definition.
The definition suggests a singular noun which matches the answer.
'good to go with colleen?' is the wordplay.
'good to go' becomes 'done' (I am not sure about this - if you are sure you should believe this answer much more).
'with' says to put letters next to each other.
'colleen?' becomes 'gal' (colleen is a kind of gal).
'done'+'gal'='DONEGAL'
Can you help me to learn more?
(Other definitions for donegal that I've seen before include "County of NW Ireland" , "County of NW?Ireland" , "Irish town" , "Lean dog (anag) - Irish county" , "Northernmost Irish county" .)