Curt rejection (5-3)
I believe the answer is:
brush-off
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">curt rejection</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for brush-off that I've seen before include "Curt rejection" , "Rejection, dismissal" .)