Type of vessel (6)
I believe the answer is:
whaler
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">type of vessel</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that whaler is a type of ship)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for whaler that I've seen before include "Captain Ahab, e.g." , "Ship armed with harpoons" , "Mammal-hunting boat" , "Aussie tramp?" , "Seaman like Ahab" .)