Man of God snoops on opening of temple (6)
I believe the answer is:
priest
'man of god' is the definition.
(thesaurus)
'snoops on opening of temple' is the wordplay.
'snoops' becomes 'pries' (I've seen this before).
'on' means one lot of letters go next to another.
'opening of' indicates taking the first letters.
The first letter of 'temple' is 't'.
'pries'+'t'='PRIEST'
(Other definitions for priest that I've seen before include "Stripe (anag)" , "Minister of religion" , "Church minister" , "stunner" , "Ordained minister" .)