Beat or force out of Northern Ireland (6)
I believe the answer is:
punish
'beat' is the definition.
(I've seen this before)
'force out of northern ireland' is the wordplay.
'force' becomes 'push' (synonyms).
'out of' is an insertion indicator (some letters on the outside of others).
'northern ireland' becomes 'NI' (abbreviation).
'push' enclosing 'ni' is 'PUNISH'.
'or' acts as a link.
(Other definitions for punish that I've seen before include "Treat harshly or severely" , "Like wordplay in speech" , "Mete out penalty to" , "beat" , "exact retribution" .)