Rebuff, cut (4)
I believe the answer is:
snub
I believe this is a double definition.
'rebuff' is the first definition.
(I know that rebuff can be written as snub)
'cut' is the second definition.
(I know that cut can be written as snub)
(Other definitions for snub that I've seen before include "Reject greeting or approach" , "A rebuff for turned-up sort of nose" , "Blank" , "Cut; ignore" , "Rude put-down; blunt (nose)" .)