OT's aim to represent a religion (6)
I believe the answer is:
taoism
'a religion' is the definition.
(I know that Taoism is a religion)
'ot's aim to represent' is the wordplay.
'to represent' is an anagram indicator.
'ots'+'aim'='otsaim'
'otsaim' with letters rearranged gives 'TAOISM'.
(Other definitions for taoism that I've seen before include "Maoist (anag) -- Chinese religion" , "Chinese philosophical system" , "Religious movement" , "Ancient Chinese philosophy" , "Chinese thinking" .)