Enigmas (9)
I believe the answer is:
mysteries
'enigmas' is the definition.
('mystery' can be a synonym of 'enigma')
This is the entire clue.
(Other definitions for mysteries that I've seen before include "Inexplicable things" , "in which priests classically played leading role" , "Enigmas, puzzles" , "Messy rite incorporates puzzles" , "Arcana" .)