Great work produced by teacher and bishop, maybe (11)
I believe the answer is:
masterpiece
'great work' is the definition.
(I've seen this before)
'teacher and bishop maybe' is the wordplay.
'teacher' becomes 'master' (I've seen this before).
'and' is a charade indicator (letters next to each other).
'bishop maybe' becomes 'piece' (bishop is a chess piece).
'master'+'piece'='MASTERPIECE'
'produced by' is the link.
(Other definitions for masterpiece that I've seen before include "Outstanding item of workmanship" , "Superb work of art" , "Chef d'oeuvre" , "Outstanding work of art" , "Great work" .)