Possible Clues:

• Software provider sharing a name with a Greek prophet
• Expert for boat without a bow
• One advising one to leave the Spanish capital when rejected
• Carole's making an announcement
• Pythia of the Temple of Apollo, for one
• Seer's shrine
• Know all the old Irish people, for instance, around Limerick
• Authority to be consulted
• Agent of divine revelation
• Rowing boat about to leave? It's an infallible indication