Irish county closes this foul deli selling risotto (5)
I believe the answer is:
sligo
'irish county' is the definition.
(I've seen this before)
'closes this foul deli selling risotto' is the wordplay.
'closes' suggests the final letters (I've seen 'close of' mean this (the letter which ends or closes the word)).
The final letters of 'this foul deli selling risotto' are 'SLIGO'.
(Other definitions for sligo that I've seen before include "Yeat's county" , "NW Irish county" , "Irish port" , "one of twenty-six" , "part of Ireland" .)