An issue or difficulty (7)
I believe the answer is:
problem
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">an issue</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >'<span class="explanation-format__original">difficulty</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that problem is a type of difficulty)</span><br/ ><br/ ></span>
(Other definitions for problem that I've seen before include "Quandary or dilemma" , "Hitch" , "Question or source of perplexity" , "Difficulty to be solved" , "One hard to understand, solve" .)