Ancient prophet (6)
I believe the answer is:
oracle
'ancient prophet' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for oracle that I've seen before include "Person of great wisdom, as in Delphi of old" , "Divinely-inspired prophecy" , "Where advice or prophecy was sought from the gods in ancient Greece" , "Augur - prediction" , "Place where ancient Greeks consulted gods, as at Delphi" .)