Humiliate, do down (8)
I believe the answer is:
belittle
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">humiliate</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">do down</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for belittle that I've seen before include "Disparage - minimise" , "Make light of" , "Make small" , "Disparage, run down" , "Denigrate, disparage" .)