Annoying, troublesome (6)
I believe the answer is:
trying
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">annoying</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">troublesome</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for trying that I've seen before include "Difficult - annoying" , "Bothersome" , "Tiresome" , "Making attempts" , "Vexatious - having a go" .)