Witty banter (8)
I believe the answer is:
repartee
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">witty banter</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 repartee that I've seen before include "Witty exchange" , "Banter - pear tree (anag)" , "Quick and witty conversation" , "Witty comments" , "Ready wit" .)