Melville captain (4)
I believe the answer is:
ahab
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">melville captain</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 ahab that I've seen before include "One whose nemesis was white" , "Husband of Jezebel" , "sea captain" , "Jezebel's husband - Moby Dick's hunter" , "one who hunted whales" .)