Non-flowering plant westwards somewhat unrefined (4)
I believe the answer is:
fern
'non-flowering plant' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for fern that I've seen before include "Fronded plant" , "Plant reproducing by spores" , "Feathery-leaved plant" , "Often shady plant" , "Non-flowering plant" .)