Not completely skint, here debtor is overdrawn (2,3,3)
I believe the answer is:
in the red
'is overdrawn' is the definition.
(I've seen this in another clue)
'not completely skint here debtor' is the wordplay.
'not completely' says the answer is hidden in the clue.
'IN THE RED' is hidden within 'skint here debtor'.
(Other definitions for in the red that I've seen before include "Santa appears thus" , "have no credit" , "needing cash injection" , "Broke" , "Owing money, bank account overdrawn" .)