Cut tax evasion to some extent (3)
I believe the answer is:
axe
'cut' is the definition.
(both can mean to cancel or remove)
'tax evasion to some extent' is the wordplay.
'to some extent' indicates the answer is hidden within the clue.
'AXE' is hidden in the letters of 'tax evasion'.
(Other definitions for axe that I've seen before include "Remove ruthlessly or suddenly" , "can bring down plane" , "Abandon project or cut back on resources" , "Make redundant" , "Cut costs or staff drastically" .)