Hit man (8)
I believe the answer is:
assassin
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hit man</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for assassin that I've seen before include "Bravo!" , "Political murderer" , "Murderer (of prominent figure)" , "Asians SS? (Anag)" , "Murderer, killer" .)