Coxswain (8)
I believe the answer is:
helmsman
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">coxswain</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 helmsman that I've seen before include "Boat steerer" , "Steersman" , "source of direction" , "Ship's steerer" , "One steers a boat" .)