Graceful girl (5)
I believe the answer is:
sylph
'graceful girl' 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 "Thin, graceful woman" , "Slender and graceful young woman" , "Girl with slender figure" , "Slim person" , "Imaginary (female) being" .)