"Riders to the Sea" playwright
I believe the answer is:
synge
'riders to the sea playwright' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for synge that I've seen before include "John Millington . . . . ., great Irish playwright" , "creator of Playboy character" , "Playboy of the Western World playwright" , "J. M. --, Irish poet/playwright" , "Irish poet and playwright, d. 1909" .)