Nappy leather (5)
I believe the answer is:
suede
'nappy leather' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for suede that I've seen before include "Leather with velvety nap used in shoes and clothes" , "unprepared material" , "Soft goatskin" , "Fabric" , "Soft leather with one side napped" .)