Annoyed Fenian leaders at Northern Irish party (3,2)
I believe the answer is:
fed up
'annoyed' is the definition.
(I've seen this before)
'fenian leaders at northern irish party' is the wordplay.
I cannot really see how this works, but
'northern' could be 'up' (eg in the term 'upstate') and 'up' is located in the answer.
The remaining letters 'fed' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for fed up that I've seen before include "like infant in high chair?" , "Disaffected" , "'Bored with eating? (3,2)'" , "Depressed" , "Hacked off" .)