Novelist Harper (3)
I believe the answer is:
lee
'novelist 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 "Confederate general" , "The sheltered side - of Cork's river?" , "Shelter" , "The side that's sheltered from the wind" , "The sheltered side of something" .)