Reversed, as an action (5)

I believe the answer is:
undid
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">reversed as an action</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for undid that I've seen before include "Disentangled" , "Cancelled - destroyed" , "solved knotty problem" , "Annulled; unfastened" , "Reversed, destroyed" .)