Inelegant form of rose (9)
I believe the answer is:
eglantine
'rose' is the definition.
(eglantine is a kind of rose)
'inelegant form' is the wordplay.
'form' indicates anagramming the letters (a different form of the same letters).
'inelegant' anagrammed gives 'EGLANTINE'.
'of' is the link.
(Other definitions for eglantine that I've seen before include "Wild rose, sweet briar" , "Milton's honeysuckle" , "Rose, growing wild" , "Inelegant (anag.); wild rose" , "Inelegant (anag) - plant" .)