Man-made fibre (7)
I believe the answer is:
acrylic
'man-made fibre' is the definition.
(I know that acrylic is a type of man-made fibre)
This is the entire clue.
(Other definitions for acrylic that I've seen before include "Synthetic fabric" , "Type of paint or textile fibre" , "The synthetic fibre is icy, Carl" , "Shiny paint" , "Type of twenty Dn" .)