Snarer of wildlife returning in salesman role (7)
I believe the answer is:
trapper
'snarer of wildlife' is the definition.
'returning in salesman role' is the wordplay.
'returning in' says the letters should be written in reverse.
'salesman' becomes 'rep' (I've seen this before).
'role' becomes 'part' ('part' can be a synonym of 'role').
'rep'+'part'='reppart'
'reppart' written backwards gives 'TRAPPER'.
(Other definitions for trapper that I've seen before include "Catcher of animals for their fur" , "Fur trader, probably" , "One seeking fur" , "voyageur" , "Kit Carson, for example" .)