Salesman returns carrying fish and device for removing skin (6)
I believe the answer is:
peeler
'device for removing skin' is the definition.
(device for removing skin from vegetables etc)
'salesman returns carrying fish' is the wordplay.
'salesman' becomes 'rep' (I've seen this before).
'returns' says the letters should be written in reverse.
'carrying' is an insertion indicator.
'fish' becomes 'eel' (eel is a kind of fish).
'rep' in reverse letter order is 'per'.
'per' placed around 'eel' is 'PEELER'.
'and' acts as a link.
(Other definitions for peeler that I've seen before include "apprehended by a _____?" , "Kitchen knife" , "Old copper" , "kitchen utensil" , "stripper" .)