Possible Clues:

• To do with priests
• Priestly dictator's loftier loft
• Ancient script found in garret up even more stairs, say?
• Loftier storey announced as belonging to priest
• Priestly
• To do what or about priests
• Move quickly and run a movement involving priests
• Sounds as if it's even above the top of the house, but actually it's 3 down
• Just like a priest to teach one religious instruction badly?
• Of or concerning priests