Possible Clues:

• In Greek mythology, a giant with 100 eyes
• Monster with many eyes slain by Hermes in Greek myth
• Watchman runs to feed a theatre cat
• The Guardian starts to assess Roman government under Severus
• In Greek myth, a many-eyed monster slain by Hermes
• Pheasant; butterfly
• Many-eyed monster
• Io's guardian, in Greek myth
• '72 Wishbone Ash album
• Legendary Guardian debate sees bridge player going for his opponent