Answer: repealing

AnswerCrossword Clue
REPEALINGRescinding
REPEALINGTaking back
REPEALINGAnnulling
REPEALINGUndoing an act
REPEALINGUndoing, as an act
repealingREPEAL, to revoke (to annul by taking back)
repealingRevoke or annul (a law or congressional act)