Improvise, speak without notes (2-3)
I believe the answer is:
ad-lib
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">improvise</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that improvise can be written as ad-lib)</span><br/ ><br/ >'<span class="explanation-format__original">speak without notes</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for ad-lib that I've seen before include "Extemporise" , "Unprepared remark" , "spontaneous comment" , "Improvise" , "Speak off the cuff" .)