Fiona of "Killing Eve" (4)
I believe the answer is:
shaw
'fiona of killing eve' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for shaw that I've seen before include "making an appearance in Craiglockhart?" , "Thicket; playwright" , "writer of plays and critical commentaries" , "Major Barbara playwright" , "Playwright; small wood" .)