Youngest daughter of Tsar Nicholas II (9)
I believe the answer is:
anastasia
'youngest daughter of tsar nicholas ii' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for anastasia that I've seen before include "Youngest daughter of Tsar Nicholas II" , "Russian Grand Duchess, who probably didn't escape the Romanov massacre" , "Russian princess thought once to have survived the revolution" , "Film" , "Bolsheviks dispatched her" .)