Fellow crew member (8)
I believe the answer is:
shipmate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fellow crew member</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for shipmate that I've seen before include "Colleague on board" , "Friend on board" , "Fellow crew member" , "Fellow crewman" , "Fellow sailor" .)