Pantheon's locale (4)
I believe the answer is:
rome
'pantheon's locale' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rome that I've seen before include "Where to emulate the locals" , "Italian city" , "When here, do as the citizens do" , "Colosseum city" , "Spanish Steps city" .)