Slender graceful female (5)
I believe the answer is:
sylph
'slender graceful female' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for sylph that I've seen before include "Slender, graceful female" , "Thin, graceful woman" , "slender lass!" , "Imaginary (female) being" , "Slender and graceful young woman" .)