Bunk on a ship (5)
I believe the answer is:
berth
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bunk on a ship</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 berth that I've seen before include "Sleeping place in ship" , "Bed on a ship/train" , "Bunk on board" , "Bed for traveller" , "Bunk in a vessel" .)