Fantastic result for Irish province (6)
I believe the answer is:
ulster
'irish province' is the definition.
(I've seen this before)
'fantastic result' is the wordplay.
'fantastic' indicates an anagram.
'result' anagrammed gives 'ULSTER'.
'for' is the link.
(Other definitions for ulster that I've seen before include "Area of Ireland" , "Ancient northern Irish kingdom" , "Overcoat; former kingdom in Ireland" , "Overcoat; N. Ireland" , "former province of Ireland" .)