Unidentified rogue salesmen (8)
I believe the answer is:
nameless
'unidentified' is the definition.
('nameless' can be a synonym of 'unidentified')
'rogue salesmen' is the wordplay.
'rogue' indicates anagramming the letters.
'salesmen' is an anagram of 'NAMELESS'.
(Other definitions for nameless that I've seen before include "Too horrific to be described" , "Too unpleasant" , "like the guy in the spaghetti movies?" , "This undistinguished" , "Lacking means of identification" .)