Authentic dramatist, German, not British (4)
I believe the answer is:
echt
'authentic' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for echt that I've seen before include "Authentic and typical" , "Really" , "Genuine -- honest" , "True" , "Genuine (Ger.)" .)