Clergyman in park on hill (6)
I believe the answer is:
rector
'clergyman' is the definition.
(rector is a kind of clergyman)
'park on hill' is the wordplay.
'park' becomes 'rec' (I've seen this in other clues).
'on' says to put letters next to each other.
'hill' becomes 'tor' (tor is a kind of hill).
'rec'+'tor'='RECTOR'
'in' acts as a link.
(Other definitions for rector that I've seen before include "Parish clergyman" , "Member of the clergy" , "Vicar" , "Church official" , "Type of clergyman" .)