Floor protector (3)
I believe the answer is:
rug
'floor protector' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rug that I've seen before include "Mat or knee-cover" , "Floor (or lap) covering" , "Informal term for a toupee" , "Mat - blanket" , "Thick-piled floor mat" .)