Possible Clues:

• Title held by the people who lent their names to 17-, 24-, 38- and 49-Across
• Leader's turbulent priest found outside study
• Leader's gift including driving licence, say
• Leader kind of tense having stolen passport, say?
• Title for the person named at the ends of 17-, 24-, 40- and 51-Across
• Top person now harbouring unconscious mass of primitive energies
• Important person's documentation found in here
• Leader of a republic
• That's the internationally recognised way to try if one can go on strike, perhaps