Gregory Peck's "Moby Dick" role
I believe the answer is:
ahab
'gregory peck's moby dick role' 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 "Husband of Jezebel" , "Captain -, pursuer of Moby Dick" , "one who hunted whales" , "Whaling Captain" , "Captain in search of Moby Dick" .)