Done without preparation (9)
I believe the answer is:
extempore
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">done without preparation</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for extempore that I've seen before include "Without preparation, of a speech say" , "Off-the-cuff" , "With no notes" , "Dashed off" , "unprepared" .)