Marley of "A Christmas Carol” (5)
I believe the answer is:
jacob
'marley of a christmas carol' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for jacob that I've seen before include "Esau's twin brother" , "Fellow" , "A son of Isaac (Bible)" , "Twin of Esau" , "Father of the twelve patriarchs of Israel" .)