Arthur's Seat? (7)
I believe the answer is:
camelot
'arthur's seat?' is the definition.
(mythical home of King Arthur)
This is all the clue.
(Other definitions for camelot that I've seen before include "Scene of King Arthur's court" , "King Arthur's town" , "King Arthur's court - or JFK's" , "Lerner and Loewe musical" , "Arthur's or Kennedy's court?" .)