Greek oracle site (6)
I believe the answer is:
delphi
'greek oracle site' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for delphi that I've seen before include "Ancient Greek city, site of famous oracle" , "Place of the famous oracle" , "Temple site on Mt Parnassus" , "Scene of ancient oracle" , "'Ancient Greek city, site of the oracle (6)'" .)