Eminent conductor (7)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">eminent conductor</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for maestro that I've seen before include "Distinguished musician - most are (anag)" , "car" , "Eminent conductor or composer" , "Master of an art, or a great conductor of music" , "Expert musician" .)