It's possibly willow that supplies flame, I'm not sure (6)
I believe the answer is:
wicker
'willow that supplies flame i'm not sure' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for wicker that I've seen before include "Thin canes or osiers woven together in making furniture" , "Thin cane used to make furniture" , "Pliant twig, osier" , "Basketwork" , "Thin canes woven together as material" .)