Scrub or cancel (5)
I believe the answer is:
abort
I believe this is a double definition.
'scrub' is the first definition.
(I've seen this in another clue)
'cancel' is the second definition.
(I've seen this in another clue)
(Other definitions for abort that I've seen before include "Pull the plug on" , "Miscarry" , "End prematurely" , "Terminate prematurely" , "[FINISH] prematurely" .)