"Pygmalion” writer (4)
I believe the answer is:
shaw
'pygmalion writer' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for shaw that I've seen before include "Pygmalion playwright" , "Irish playwright, d. 1950" , "Thicket; playwright" , "G. B. ---; T. E. ---" , "George Bernard -, Irish dramatist" .)