Nuisance, bane (4)
I believe the answer is:
pest
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">nuisance</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">bane</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for pest that I've seen before include "Troublesome person" , "Menace" , "Annoying person" , "Constant nuisance" , "Annoyance" .)