Golf ever mostly in Irish location (6)
I believe the answer is:
galway
'irish location' is the definition.
The definition suggests a singular noun which matches the answer.
'golf ever mostly' is the wordplay.
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'ever' becomes 'always' ('always' can be a synonym of 'ever').
'mostly' means to remove the last letter.
'always' with its last letter taken away is 'alway'.
'g'+'alway'='GALWAY'
'in' is the link.
Can you help me to learn more?
(Other definitions for galway that I've seen before include "Western City of the Tribes" , "Connacht city" , "County of W. Ireland" , "flautist" , "W. Irish town, county, bay" .)