Animal found on street is badger (6)
I believe the answer is:
molest
'is badger' is the definition.
(I've seen this before)
'animal found on street' is the wordplay.
'animal' becomes 'mole' (mole is a kind of animal**).
'found on' means one lot of letters go next to another.
'street' becomes 'st'.
'mole'+'st'='MOLEST'
(Other definitions for molest that I've seen before include "Accost or pester" , "Accost in motels" , "Harry" , "Disturb, interfere with" , "Fame" .)