Troubling (10)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">troubling</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for bothersome that I've seen before include "Annoying" , "Irritating" , "Trying" , "A pain" , "Perplexing" .)
(Other definitions for concerning that I've seen before include "Worrying; about" , "anxiety" .)