Repeat performance (6)

I believe the answer is:
encore
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">repeat performance</span>' is the definition.<br/ ><span class="explanation-format__explanation">(an extension or repeat of a performance)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for encore that I've seen before include "Let's hear/see it again!" , "Repeated performance demanded by an audience" , "Audience call for another performance" , "Repetition of performance" , "Additional work performed" .)