Rubbish church resistance over clergyman (6)
I believe the answer is:
rector
'clergyman' is the definition.
(I know that rector is a type of clergyman)
'rubbish church resistance over' is the wordplay.
'rubbish' becomes 'rot' (both can mean nonsense).
'church' becomes 'CE' (abbreviation for Church of England).
'resistance' becomes 'r' (electronics abbreviation).
'over' says the letters should be written in reverse.
'rot'+'ce'+'r'='rotcer'
'rotcer' back-to-front is 'RECTOR'.
(Other definitions for rector that I've seen before include "Churchman" , "Cleric" , "Vicar" , "Preacher Man" , "Type of clergyman" .)