Pinball palaces (7)
I believe the answer is:
arcades
'pinball palaces' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for arcades that I've seen before include "Covered passages with shops and stalls" , "Arched walks" , "Covered walkways" , "Colonnades" , "More than one mall" .)