Rejected bread rolls as cut (4)
I believe the answer is:
snub
'cut' is the definition.
(I know that cut can be written as snub)
'rejected bread rolls' is the wordplay.
'rejected' shows that the letters should be reversed in order.
'bread rolls' becomes 'buns' (I've seen this in another clue).
'buns' written backwards gives 'SNUB'.
'as' acts as a link.
(Other definitions for snub that I've seen before include "A rebuff for turned-up sort of nose" , "Rebuff humiliatingly" , "Short and blunt - rebuff" , "Treat with disdain" , "Check" .)