Murdoch, for one, hailed primarily from Dublin? (5)
I believe the answer is:
irish
'from dublin?' is the definition.
(Dublin is in Ireland)
'murdoch for one hailed primarily' is the wordplay.
'murdoch for one' becomes 'Iris' (author Iris Murdoch).
'primarily' suggests taking the first letters.
The first letter of 'hailed' is 'h'.
'iris'+'h'='IRISH'
(Other definitions for irish that I've seen before include "From Eire" , "W European" , "Eg, native to Dublin" , "Of this place" , "Gaelic language" .)