Disgusting overdraft, evidence of debts (6)
I believe the answer is:
odious
'disgusting' is the definition.
(thesaurus)
'overdraft evidence of debts' is the wordplay.
'overdraft' becomes 'od'.
'evidence of debts' becomes 'ious' (I've seen this in other clues).
'od'+'ious'='ODIOUS'
(Other definitions for odious that I've seen before include "Hateful, really nasty" , "Disagreeable" , "Detestable, execrable" , "Contemptible" , "Abominable, detestable" .)