Criminal left another one to the auditor (9)
I believe the answer is:
larcenist
'criminal' is the definition.
(larcenist is a kind of criminal)
'left another one to the auditor' is the wordplay.
I cannot really see how this works, but
'left' could be 'l' (common abbreviation) and 'l' is found within the answer.
'another' could be 'r' (I've seen this in other clues) and 'r' is present in the answer.
'one' could be 'ace' (ace has a value of one in some card games) and 'ace' is found within the leftover letters.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is located in the answer.
The remaining letters 'nis' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for larcenist that I've seen before include "One steals clarinets, oddly" , "Person who takes" , "One criminal" , "Thief" , "Dishonest person" .)