Is fond of the cast looking to get to grips with Moby Dick perhaps (6)

I believe the answer is:

angler

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I'm afraid I can't explain this answer.

(Other definitions for angler that I've seen before include "I may do casting" , "Hook and line fisherman" , "person hoping to catch fish" , "Strait; -- of Lochalsh" , "A rod-and-line fisherman" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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