Devastating, overwhelming (8)
I believe the answer is:
crushing
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">devastating</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(both can mean causing great distress)</span><br/ ><br/ >'<span class="explanation-format__original">overwhelming</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for crushing that I've seen before include "Violently subduing (opposition)" , "Squeezing together" .)