Park-keeper following devout individual who's from elsewhere (8)
I believe the answer is:
stranger
'individual who's from elsewhere' is the definition.
I can't tell whether this defines the answer.
'park-keeper following devout' is the wordplay.
'park keeper' becomes 'ranger' (I've seen this before).
'following' is a charade indicator (letters next to each other).
'devout' becomes 'st' (I can't explain this - if you can you should believe this answer much more).
'ranger' put after 'st' is 'STRANGER'.
Can you help me to learn more?
(Other definitions for stranger that I've seen before include "Odder, more peculiar" , "Person one doesn't know" , "More odd or unknown" , "Regrants oddly to person unknown" , "More odd or wierd" .)