German playwright Bertolt (6)
I believe the answer is:
brecht
(Other definitions for brecht that I've seen before include "Bertolt --, German poet, dramatist" , "German playwright, 1898-1956" , "Bertolt --, Ger. author" , "German dramatist and poet who wrote The Threepenny Opera, d.1956" , "German dramatist and librettist" .)