Ancient doctor prophetic, as seen afresh (11)
I believe the answer is:
hippocrates
'ancient doctor' is the definition.
'prophetic as seen afresh' is the wordplay.
'seen afresh' is an anagram indicator (letters in a fresh order).
'prophetic'+'as'='propheticas'
'propheticas' is an anagram of 'HIPPOCRATES'.
(Other definitions for hippocrates that I've seen before include "he produced an oath" , "Greek physician" , "celebrated doctor" , "He offered oath" .)