Gallery displaying supernatural beings (4)
I believe the answer is:
gods
I believe this is a double definition.
'gallery' is the first definition.
(I've seen this in other clues)
'supernatural beings' is the second definition.
(god is a kind of supernatural being)
'displaying' is the link.
(Other definitions for gods that I've seen before include "objects of worship" , "high up in theatre" , "Idols" , "Area of theatre" , "Superhuman beings" .)