Toupee, slangily (3)
I believe the answer is:
rug
'toupee slangily' 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" , "Hairpiece" , "cover" , "Mat, carpet" .)