Spartan beauty (5)
I believe the answer is:
helen
'spartan beauty' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for helen that I've seen before include "beautiful woman" , "lady" , "Greek woman famed for beauty" , "Beautiful daughter of Zeus and Leda who was abducted by Paris" , ""The face the launched 1,000 ships"" .)