Source of prophecies (6)
I believe the answer is:
oracle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">source of prophecies</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for oracle that I've seen before include "Ancient Greek expounder of wisdom" , "Place where ancient Greeks consulted gods, as at Delphi" , "One successfully worked" , "Diviner of the future" , "Someone of great wisdom" .)