Entrance for spectators (4)
I believe the answer is:
gate
I believe this is a double definition.
'entrance' is the first definition.
(type of entrance)
'spectators' is the second definition.
(I've seen this before)
'for' acts as a link.
(Other definitions for gate that I've seen before include "Attendance; entrance" , "Narrow opening" , "Attendance at a sporting event" , "Doorway" , "Entrance to a Dublin theatre" .)