Town in the province of Antwerp, Belgium with a Trappist abbey (6)
I believe the answer is:
brecht
(Other definitions for brecht that I've seen before include "Bertolt --, Ger. author" , "Bertolt --, German poet, dramatist" , "Bertolt -, Ger. dramatist (Mother Courage)" , "German dramatist and librettist" , "Bertolt --, German writer" .)