Obsessive captain in Moby-Dick (4)

I believe the answer is:

ahab

(Other definitions for ahab that I've seen before include "Whaling Captain" , "Jezebel's husband, wicked king in the 'Old testament'" , "Jezebel's husband or captain in 'Moby Dick'" , "Captain hunting the whale Moby-Dick" , "Spring bulbs" .)

I've seen this clue in The Times.

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