Clergyman is after English builder (7)
I believe the answer is:
erector
'builder' is the definition.
(I've seen this before)
'clergyman is after english' is the wordplay.
'clergyman' becomes 'rector' (rector is a kind of clergyman).
'is after' means one lot of letters go next to another.
'english' becomes 'e' (abbreviation).
'rector' put after 'e' is 'ERECTOR'.
(Other definitions for erector that I've seen before include "Builder" , "puts things up" , "Constructor" , "The individual raising" , "Muscle" .)