Withdraw, revoke (7)
I believe the answer is:
retract
This clue is a double definition.
'withdraw' is the first definition.
(I've seen this before)
'revoke' is the second definition.
(I've seen this before)
(Other definitions for retract that I've seen before include "Take back (statement)" , "Withdraw as unjustified" , "Withdraw (offer, statement etc)" , "Revoke" , "Take back what was said" .)