Russian ballet dancer, d.1950 (8)
I believe the answer is:
nijinsky
(Other definitions for nijinsky that I've seen before include "Great dancer, d. 1950 - great racehorse, d. 1992" , "Triple Crown-winning" , "Ballet dancer; horse" , "Great Russian male dancer/ choreographer, died 1950." , "Russian ballet dancer, d. 1950 - racehorse, winner of the English Triple Crown, 1970" .)