Uncompromising like Ireland’s uprising (5)
I believe the answer is:
rigid
'uncompromising' is the definition.
(I've seen this before)
'like ireland's uprising' is the wordplay.
'like' becomes 'dig' (I've seen this in another clue).
'ireland' becomes 'ir' (abbreviation for Ireland).
'uprising' shows that the letters should be reversed in order.
'dig'+'ir'='digir'
'digir' backwards is 'RIGID'.
(Other definitions for rigid that I've seen before include "Firmly fixed" , "stern" , "Stiff and inflexible" , "Incapable of or resistant to bending" , "strict" .)