Bob Cratchit's job (5)
I believe the answer is:
clerk
'bob cratchit's job' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for clerk that I've seen before include "Office record keeper" , "Record-keeper" , "Office worker (UK) - shop assistant (US)" , "Office menial" , "Court record keeper" .)