Room on ship (5)
I believe the answer is:
cabin
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">room on ship</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for cabin that I've seen before include "Small wooden shelter" , "Uncle Tom's little house" , "Wooden dwelling" , "Private room aboard" , "class at sea?" .)