Arranges classes in society (6)
I believe the answer is:
orders
This clue is a double definition.
'arranges' is the first definition.
('order' can be a synonym of 'arrange')
'classes in society' is the second definition.
(Other definitions for orders that I've seen before include "Demands" , "'Instructions, commands (6)'" , "Sends away for" , "Monastic societies" , "Directs" .)