Recall; annul (6)
I believe the answer is:
revoke
I believe this is a double definition.
'recall' is the first definition.
(thesaurus)
'annul' is the second definition.
(I know that annul can be written as revoke)
(Other definitions for revoke that I've seen before include "Annul (a decree)" , "Retract" , "(At cards) fail to follow suit despite being able" , "Withdraw or cancel a decree" , "'Repeal, cancel (6)'" .)