Graceful young woman (5)
I believe the answer is:
sylph
'graceful young woman' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sylph that I've seen before include "Slender, graceful girl" , "Girl with slender figure" , "Imaginary (female) being" , "Slim person" , "Thin and graceful female" .)