Enid spread Buddhism to resident (7)
I believe the answer is:
denizen
'to resident' is the definition.
(I've seen this in another clue)
'enid spread buddhism' is the wordplay.
'spread' indicates an anagram.
'buddhism' becomes 'Zen' (Zen is an example).
'enid' anagrammed gives 'deni'.
'deni'+'zen'='DENIZEN'
(Other definitions for denizen that I've seen before include "Enid Zen (anag) - inhabitant of a particular place" , "Inhabitant (of the deep?)" , "Person in foreign country enjoying rights of natives" , "Inhabitant, occupant" , "Resident" .)