"The Fall of the House of Usher" writer (3)
I believe the answer is:
poe
'the fall of the house of usher writer' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for poe that I've seen before include "Edgar Allan . . ., writer of spooky tales" , "The Raven poet" , "Short-story writer" , "Entrance rooms; seeks support from" , "American author, d. 1849" .)