Right through, count the customer (6)
I believe the answer is:
client
'the customer' is the definition.
(synonyms)
'right through count' is the wordplay.
I cannot really see how this works, but
'right' could be 'lien' (legal right) and 'lien' is found in the answer.
The remaining letters 'ct' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for client that I've seen before include "Dependant, hanger-on" , "Buyer" , "One represented by lawyer" , "One employing lawyer" , "Professional's customer" .)