Doctor envied church grounds (8)
I believe the answer is:
evidence
'grounds' is the definition.
('evidence' can be a synonym of 'grounds')
'doctor envied church' is the wordplay.
'doctor' indicates anagramming the letters.
'church' becomes 'ce' (abbreviation for Church of England).
'envied' with letters rearranged gives 'eviden'.
'eviden'+'ce'='EVIDENCE'
(Other definitions for evidence that I've seen before include "The basis for belief or disbelief" , "Data" , "See 10" , "Information to help form a conclusion" , "material presented in court" .)