Get even for (6)
I believe the answer is:
avenge
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">get even for</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 avenge that I've seen before include "Get back at for (a wrong)" , "Inflict retribution" , "Get one's own back for" , "Carry out retribution" , "Geneva (anag)" .)