Theater walkway (5)
I believe the answer is:
aisle
'theater walkway' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for aisle that I've seen before include "Supermarket feature" , "Supermarket section" , "that would-be bride hopes to make it up!" , "Here comes the bride" , "Supermarket passageway" .)