Rejection, rebuff (7)
I believe the answer is:
refusal
I believe this clue is a double definition.
'rejection' is the first definition.
(I've seen this in another clue)
'rebuff' is the second definition.
(I've seen this before)
(Other definitions for refusal that I've seen before include "Rejection of an offer" , "The act of saying no" , "opportunity to accept or decline" , "Rebuff" , "(Horse) failure to jump" .)