Victor finds a politician behind church (5)
I believe the answer is:
champ
'victor' is the definition.
(thesaurus)
'a politician behind church' is the wordplay.
'politician' becomes 'mp'.
'behind' says to put letters next to each other.
'church' becomes 'ch' (common abbreviation).
'a'+'mp'='amp'
'amp' put after 'ch' is 'CHAMP'.
'finds' is the link.
(Other definitions for champ that I've seen before include "Crush" , "first place" , "Chew noisily" , "Top sportsman" , "Masticate, gnaw" .)