Sam —, servant of Mr Pickwick in 1836 Charles Dickens novel The Posthumous Papers of the Pickwick Club (6)
I believe the answer is:
weller
(Other definitions for weller that I've seen before include "Paul?" , "Sam's Sam" , "Sam - - , Dickens character" , "Sam -, servant to Mr. Pickwick (Dickens)" , "Sam - - ('Pickwick Papers')" .)