"To Kill a Mockingbird" author Harper (3)
I believe the answer is:
lee
'to kill a mockingbird author harper' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lee that I've seen before include "Sheltered from the wind in Cork, perhaps" , "Protection" , "The sheltered side of something" , "Area sheltered from the wind" , "Cork river" .)