Turned out to be a fine material (5)
I believe the answer is:
ninon
'fine material' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for ninon that I've seen before include "fine material" , "delicate material" , "Lightweight silk fabric" , "thin fabric" , "Fine sheer fabric" .)