Trouble, contention (6)
I believe the answer is:
strife
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">trouble</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >'<span class="explanation-format__original">contention</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for strife that I've seen before include "Contention or contest" , "Heated discord" , "Trouble, hassle" , "Bitter disagreement" , "Warfare" .)