Arrange for orchestra (5)
I believe the answer is:
score
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">arrange for orchestra</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for score that I've seen before include "Tally; group of twenty" , "musical work" , "Keep count" , "Chalk up - twenty" , "record" .)