Get disheartened proprietor to eject writer (6)
I believe the answer is:
proust
'writer' is the definition.
(I know this)
'get disheartened proprietor to eject' is the wordplay.
'get' says to put letters next to each other.
'disheartened' suggests removing the centre (the middle or heart is removed).
'to eject' becomes 'oust' (I've seen this before).
'proprietor' with its centre removed is 'pr'.
'pr'+'oust' is 'PROUST'.
(Other definitions for proust that I've seen before include "Great French novelist found in stupor" , "French novelist - stupor (anag)" , "Remembrance of Things Past author" , "Marcel ---, Fr. author" , "Marcel --, French novelist 1871-1922" .)