"Lost in Yonkers" playwright Neil (5)
I believe the answer is:
simon
'lost in yonkers playwright neil' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for simon that I've seen before include "Harris and Coveney" , "Bolivar, de Montfort, Callow or Cowell?" , "Peter (NT)" , "Fellow" , "See 1" .)