Orchestra director (9)
I believe the answer is:
conductor
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">orchestra director</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 conductor that I've seen before include "Lightning --; bus --" , "Bandleader" , "Director - band leader" , "See 12" , "Train guard" .)