Ballet Russe dancer Léonide (7)
I believe the answer is:
massine
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ballet russe dancer leonide</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 massine that I've seen before include "Ballet dancer" , "Leonide - - , ballet legend" .)