Decorative material used in footwear (4)
I believe the answer is:
lace
This clue could be a double definition.
'decorative material' is the first definition.
(I've seen this in another clue)
'footwear' is the second definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'used in' acts as a link.
Can you help me to learn more?
(Other definitions for lace that I've seen before include "Fabric made in openwork design" , "Fine open fabric" , "Tear" , "Delicate open-weave fabric" , "Delicate fabric woven in an open web" .)