Amorphous (9)
I believe the answer is:
shapeless
'amorphous' is the definition.
(I know that amorphous can be written as shapeless)
This is the entire clue.
(Other definitions for shapeless that I've seen before include "unattractive to look at?" , "Lacking definite form" , "Without definite form" , "Amorphous" , "unstructured" .)