Harsh, cutting (7)
I believe the answer is:
acerbic
I believe this clue is a double definition.
'harsh' is the first definition.
(I've seen this before)
'cutting' is the second definition.
(I've seen this before)
(Other definitions for acerbic that I've seen before include "Bitter, sour" , "Cutting" , "Bitter-tasting" , "Acrimonious" , "Harsh and sharp in speech" .)