He doesn't believe, as others do, in stirring the rice (7)
I believe the answer is:
heretic
'he doesn't believe as others do' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'stirring the rice' is the wordplay.
'stirring' indicates an anagram.
'the'+'rice'='therice'
'therice' is an anagram of 'HERETIC'.
'in' is the link.
Can you help me to learn more?
(Other definitions for heretic that I've seen before include "Original thinker" , "enough for victim of Inquisition?" , "Unorthodox believer" , "Person with opinions contrary to Church norms" , "Nonconformist" .)