It's no credit to one, being in debt (5)

I believe the answer is:
debit
'debt' is the definition.
(thesaurus)
'it's no credit to one being' is the wordplay.
'it's no credit' becomes 'it' (I am not sure about this - if you are sure you should believe this answer much more).
'to' means one lot of letters go next to another (I've seen this in other clues).
'one being' becomes 'deb' (deb is a kind of being).
'it' put after 'deb' is 'DEBIT'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for debit that I've seen before include "Deduct from account" , "Charge" , "Take money away from" , "Enter in accounts as sum owed" , "Opposite of 23 across" .)
