Cash -- shilling -- Scrooge's clerk hasn’t got it (7)
I believe the answer is:
scratch
'cash' is the definition.
(thesaurus)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for scratch that I've seen before include "In golf, a handicap of zero strokes" , "withdraw from tournament" , "claw" , "minor injury" , "Slight cut" .)