Pass member of the clergy eating Northern Irish dish (9)
I believe the answer is:
colcannon
'irish dish' is the definition.
(I've seen this before)
'pass member of the clergy eating northern' is the wordplay.
'pass' becomes 'col' (col is a term for a mountain pass).
'member of the clergy' becomes 'canon' (type of clergyman).
'eating' is an insertion indicator.
'northern' becomes 'n' (abbreviation e.g. N. Ireland).
'canon' going around 'n' is 'cannon'.
'col'+'cannon'='COLCANNON'
(Other definitions for colcannon that I've seen before include "Irish cabbage, potato dish" , "Vegetarian dish for 19 [PADRAIC]" , "Traditional Irish dish of mashed potatoes and cabbage" , "fed to the Irish?" , "plate for Seamus?" .)