Soldier for hire (9)
I believe the answer is:
mercenary
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">soldier for hire</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for mercenary that I've seen before include "Paid soldier" , "Soldier for hire" , "Bent on making money" , "Acting for money" , "Professional soldier serving in a foreign army" .)