Self-inflicted setback (3,4)
I believe the answer is:
own goal
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">self-inflicted setback</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for own goal that I've seen before include "Costly footballing error" , "Accidental score against oneself or one's team" , "Self-made disadvantage" , "bad mistake" , "Backfiring effort" .)