Self-murder (7)
I believe the answer is:
suicide
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">self-murder</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for suicide that I've seen before include "Felo de se" , "Self-destruction" , "Self-killing" , "Act of killing oneself" .)