Audition tape (4)
I believe the answer is:
demo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">audition tape</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for demo that I've seen before include "Protest march (sl.)" , "Brass instrument valve" , "In brief, a public event as of protest under dome" , "Show" , "Eg, protest march" .)