Rug (6)
'rug' is the definition.
(both are floor coverings)
This is all the clue.
(Other definitions for mat that I've seen before include "Not glossy" , "Foot-wiper on which welcome may be kept" , "Dull, rug" , "Piece of material for wiping feet on" , "What the cat sat on?" .)
'rug' is the definition.
(I know that rug can be written as carpet)
This is the entire clue.
(Other definitions for carpet that I've seen before include "Tell off" , "Tick off" , "Reprimand severely" , "What may deaden sound in room" , "that probably won't be seen on the factory floor?" .)