Cross over street entrance (7)
I believe the answer is:
doorway
'entrance' is the definition.
(doorway is a kind of entrance)
'cross over street' is the wordplay.
'cross' becomes 'door' (a door is a kind of cross).
'over' says to put letters next to each other.
'street' becomes 'way' (I've seen this before).
'door'+'way'='DOORWAY'
(Other definitions for doorway that I've seen before include "Opening" , "Room access, threshold" , "Threshold, portal" , "Entrance to a room" .)