With all playing together (5)
I believe the answer is:
tutti
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">with all playing together</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 tutti that I've seen before include "With all playing together (music)" , "Orchestral passage" , "Everybody (mus.)" , "All performers (mus.)" , "All instruments must play" .)