Slight problem
I believe the answer is:
snag
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">slight problem</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 snag that I've seen before include "Stumbling block" , "Difficulty; catch" , "Slight problem" , "Jagged projection" , "Unforeseen obstacle" .)