Poe or Bergen
I believe the answer is:
edgar
I believe this clue is a double definition.
'poe' is the first definition.
(I've seen this in another clue)
'bergen' is the second definition.
(I've seen this in another clue)
(Other definitions for edgar that I've seen before include "- Wallace, Eng. thriller writer" , "Great writer of spooky stories, . . . . . Allan Poe" , "Grade (anag)" , ". . . . . Allan Poe, master of the macabre" , "character in King Lear" .)