Frugal aid to keeping warm? (3)
I believe the answer is:
rug
'frugal aid to keeping warm?' is the definition.
I can't judge whether this definition defines the answer.
'frugal aid to keeping' is the wordplay.
'to keeping' indicates a hidden word.
'RUG' is hidden within 'frugal aid'.
Can you help me to learn more?
(Other definitions for rug that I've seen before include "Thick-piled floor mat" , "Thick floor-mat or coverlet" , "A bug may be snug in it" , "Thick mat" , "Mat or knee-cover" .)