A less peculiar fellow: a rep (8)
I believe the answer is:
salesman
'a rep' is the definition.
(I've seen this before)
'a less peculiar fellow' is the wordplay.
'peculiar' is an anagram indicator (a peculiar or strange ordering of the letters).
'fellow' becomes 'man' (fellow can mean a man).
'a'+'less'='aless'
'aless' anagrammed gives 'sales'.
'sales'+'man'='SALESMAN'
(Other definitions for salesman that I've seen before include "Company representative" , "He sells goods and services" , "One selling goods" , "He used to be known as a commercial traveller" , "Death of a . . . . . . . . (Arthur Miller) (8)" .)