Room on a ship (5)
I believe the answer is:
cabin
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">room on a ship</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for cabin that I've seen before include "Hamper" , "Wooden dwelling" , "place on board" , "Hut or bothy" , "Private room aboard" .)