Makes void (6)
I believe the answer is:
annuls
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">makes void</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 annuls that I've seen before include "Cancels, makes void" , "Repeals or rescinds" , "Cancels officially" , "Declares invalid" , "Renders boid" .)