Oscar winner Garson (5)
I believe the answer is:
greer
'oscar winner garson' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for greer that I've seen before include "Germaine -, Australian writer" , "Germaine - - , author and academic" , "Author of The Female Eunuch, b.1939" , "Feminist icon, Germaine" , "Germaine - (The Female Eunuch)" .)