"Moby-Dick" captain (4)
I believe the answer is:
ahab
'moby-dick 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 "Melville's Captain" , "Jezebel's husband or captain in 'Moby Dick'" , "Captain hunting the whale Moby-Dick" , "Jezebel was wife of this King of Israel" , "Husband of Jezebel" .)