Cancel, abolish (6)
I believe the answer is:
repeal
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">cancel</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that repeal is a kind of cancel)</span><br/ ><br/ >'<span class="explanation-format__original">abolish</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for repeal that I've seen before include "This is what O'Connell wanted" , "Annul, rescind" , "reversal of act" , "Abrogate" , "Rescind or withdraw a law" .)