Rear of a boat (5)
I believe the answer is:
stern
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rear of a boat</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 stern that I've seen before include "Where sailors may be" , "Ship's rear" , "End part" , "Poop" , "Forbidding in aspect" .)