Resident turned Enid onto Buddhism (7)
I believe the answer is:
denizen
'resident' is the definition.
(I know that resident can be written as denizen)
'turned enid onto buddhism' is the wordplay.
'turned' is an anagram indicator.
'onto' says to put letters next to each other.
'buddhism' becomes 'Zen' (Zen is an example).
'enid' with letters rearranged gives 'deni'.
'deni'+'zen'='DENIZEN'
(Other definitions for denizen that I've seen before include "Dweller" , "Inhabitant, occupant" , "Enid Zen (anag) - inhabitant of a particular place" , "Person in foreign country enjoying rights of natives" , "Resident" .)