Mount of the ancient Greek gods (7)
I believe the answer is:
olympus
'mount of the ancient greek gods' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for olympus that I've seen before include "Mountain home of the Greek gods" , "In Greek myth, Mount ....... was home of the Gods" , "Mountain - dwelling place of the gods" , "Greece's highest mountain" , "Mount of the ancient Greek gods" .)