Unforeseen difficulty (4)
I believe the answer is:
snag
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unforeseen difficulty</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for snag that I've seen before include "Hitch, unexpected problem" , "Disadvantage - small hole in fabric" , "Unforeseen obstacle" , "Stumbling block" , "Tear - catch" .)