Retort; reply (7)
I believe the answer is:
riposte
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">retort</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">reply</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(riposte is a kind of reply)</span><br/ ><br/ ></span>
(Other definitions for riposte that I've seen before include "Fencer's counterattack" , "Sharp answer" , "Quick retort or return thrust in fencing" , "Snappy comeback" , "Witty retort" .)