Retract (6)
'retract' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for revoke that I've seen before include "Cancel (a decree, etc)" , "Withdraw or cancel, say a licence" , "Cancel; not follow suit" , "Annul by recalling" , "(In card games) fail to follow suit" .)
'retract' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for unsay that I've seen before include "Take back (words)" , "Recall" .)