Call off (6)
'call off' is the definition.
(synonyms)
This is all the clue.
(Other definitions for cancel that I've seen before include "Annul or call off" , "Officially prevent happening" , "Declare null and void" , "Cross out or annul" , "stop?" .)
'call off' is the definition.
(I know that call off can be written as scrub)
This is all the clue.
(Other definitions for scrub that I've seen before include "Vegetation consisting of stunted trees or bushes" , "Abandon" , "Axe" , "Clean vigorously - stunted vegetation" , "Drop" .)
'call off' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for abort that I've seen before include "[FINISH] prematurely" , "Cut short" , "Pull the plug on" , "Stop prematurely" , "Bring to premature conclusion" .)