Religious leader in AA amid all chaos (5,4)
I believe the answer is:
dalai lama
'religious leader' is the definition.
(Tibetan religious leader)
'aa amid all chaos' is the wordplay.
'chaos' indicates anagramming the letters.
'aa'+'amid'+'all'='aaamidall'
'aaamidall' is an anagram of 'DALAI LAMA'.
'in' is the link.
(Other definitions for dalai lama that I've seen before include "Tibetan Buddhist leader, meaning ocean monk" , "eastern leader" , "Tibetan exile" , "Chief Tibetan priest" , "'Spiritual leader of Tibet (5,4)'" .)