Artilleryman (6)
I believe the answer is:
gunner
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">artilleryman</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that artilleryman can be written as gunner)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for gunner that I've seen before include "Artilleryman" , "Private in the Royal Artillery" , "Artillery soldier" .)