Dishevelled street dog (6)
I believe the answer is:
setter
'dog' is the definition.
(setter is a type of dog)
'dishevelled street' is the wordplay.
'dishevelled' indicates anagramming the letters.
'street' is an anagram of 'SETTER'.
(Other definitions for setter that I've seen before include "pointer" , "Dog trained to point at game" , "Late evening sun is a" , "Breed of dog - crossword compiler" , "Silky-coated gun dog" .)