Final performance (4,4)
I believe the answer is:
swan song
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">final performance</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 swan song that I've seen before include "Musician's last work" , "Final utterance" , "Final performance, last hurrah" , "Last act before death, like noble white bird" , "Last appearance" .)