Severe setback (4,4)
I believe the answer is:
body blow
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">severe setback</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for body blow that I've seen before include "A severe setback, like punch to solar plexus" , "Huge setback" , "Severe disappointment" , "Sickening reverse" , "Serious setback" .)