A playwright starts to introduce boring scenes expressing nothing (5)
I believe the answer is:
ibsen
'a playwright' is the definition.
(Henrik Ibsen, 1828-1906)
'starts to introduce boring scenes expressing nothing' is the wordplay.
'starts to' suggests taking the first letters.
The initial letters of 'introduce boring scenes expressing nothing' is 'IBSEN'.
(Other definitions for ibsen that I've seen before include ""Doll's House" dramatist" , "Norse playwright" , "Norwegian playwright (Peer Gynt)" , "Scandinavian playwright" , "foreign author" .)