Two-masted sailing ship (10)
I believe the answer is:
brigantine
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">two-masted sailing 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 brigantine that I've seen before include "Boat" , "Two-masted sailing ship" , "vessel" .)