Conductor's concern (5)

I believe the answer is:
tempo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">conductor's concern</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 tempo that I've seen before include "Rhythm, metre" , "Speed or beat, musically" , "Rate and rhythm in music" , "Speed at which piece of music is played" , "(Musically) the speed to be played" .)