Bishop's pawn has work with English opening (4)
I believe the answer is:
pope
'bishop's' is the definition.
(the Pope is the Bishop of Rome)
'pawn has work with english opening' is the wordplay.
'pawn' becomes 'p'.
'has' says to put letters next to each other.
'work' becomes 'op' (abbreviation for opus).
'with' means one lot of letters go next to another.
'opening' indicates taking the first letters.
The first letter of 'english' is 'e'.
'p'+'op'+'e'='POPE'
(Other definitions for pope that I've seen before include "man of great authority" , "Poet - religious leader" , "Satirist" , "Head of RC church" , "St Peter was the first" .)