Salesman left in charge with a copy (7)
I believe the answer is:
replica
'copy' is the definition.
(replica is a kind of copy)
'salesman left in charge with a' is the wordplay.
'salesman' becomes 'rep' (I've seen this before).
'left' becomes 'l' (common abbreviation**).
'in charge' becomes 'ic'.
'with' says to put letters next to each other.
'rep'+'l'+'ic'+'a'='REPLICA'
(Other definitions for replica that I've seen before include "Duplicate" , "Exact copy or model" , "Facsimile" , "Parcel I made into an exact copy" , "Parcel I found with exact copy" .)