Pequod captain (4)
I believe the answer is:
ahab
'pequod captain' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ahab that I've seen before include "Jezebel was wife of this King of Israel" , "one who hunted whales" , "Jezebel's husband - Moby Dick's hunter" , "Spring bulbs" , "Captain -, pursuer of Moby Dick" .)