Strange salesmen, anonymous (8)
I believe the answer is:
nameless
'anonymous' is the definition.
(similar in meaning)
'strange salesmen' is the wordplay.
'strange' indicates an anagram.
'salesmen' with letters rearranged gives 'NAMELESS'.
(Other definitions for nameless that I've seen before include "Salesmen lacking identity" , "Difficult to describe" , "Untitled" , "like the guy in the spaghetti movies?" , "Too horrific to be described" .)