Dog wandering in street (6)
I believe the answer is:
setter
'dog' is the definition.
(setter is a type of dog)
'wandering in street' is the wordplay.
'wandering in' indicates an anagram (I've seen this in other clues).
'street' is an anagram of 'SETTER'.
(Other definitions for setter that I've seen before include "Puzzle composer" , "Street (anag.)" , "Breed of gun dog" , "Dog trained to point at game" , "stream of cattle" .)