Specialised market for Northern Irish revolutionary (5)
I believe the answer is:
niche
'specialised market' is the definition.
(I've seen this before)
'northern irish revolutionary' is the wordplay.
'northern' shows that the letters should be reversed in order (in a down clue, letters go up or 'north').
'irish' becomes 'in' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'revolutionary' becomes 'Che' (Che Guevara).
'in' reversed gives 'ni'.
'ni'+'che'='NICHE'
'for' is the link.
Can you help me to learn more?
(Other definitions for niche that I've seen before include "Position well suited to the occupier" , "Recess; comfy corner" , "somewhere comfortable" , "Specialised corner of the market" , "Chine (anag) - suitable place in life" .)