Ship's boat (7)
I believe the answer is:
pinnace
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ship's boat</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pinnace that I've seen before include "Small boat" , "Vessel" , "tender" , "Ship's boat - nice nap (anag)" .)