Staff seen around a street (4)
I believe the answer is:
road
'street' is the definition.
(I know that street can be written as road)
'staff seen around a' is the wordplay.
'staff' becomes 'rod' (both can mean a stick or cane).
'seen around' indicates putting letters inside.
'rod' going around 'a' is 'ROAD'.
(Other definitions for road that I've seen before include "course" , "public highway" , "See 2" , "Way travelled by boat" , "motorway?" .)