Hired murderer (8)
I believe the answer is:
assassin
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hired murderer</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 "I kill" , "Asians SS? (Anag)" , "Liquidator" , "Carlos the Jackal was one" , "Killer of prominent person" .)