Perfect rug to put down outside (10)
I believe the answer is:
consummate
'perfect' is the definition.
(I know that perfect can be written as consummate)
'rug to put down outside' is the wordplay.
'rug' becomes 'mat' (both are floor coverings).
'to put down' becomes 'consume' (I am not sure about this - if you are sure you should believe this answer much more).
'outside' indicates putting letters inside.
'mat' going into 'consume' is 'CONSUMMATE'.
Can you help me to learn more?
(Other definitions for consummate that I've seen before include "total" , "Showing great skill and flair" , "Supreme, perfect; make (a marriage) complete" .)