One cosily covered?
I believe the answer is:
teapot
'one' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for teapot that I've seen before include "Spouted vessel" , "Cuppa brewer" , "Hot drink dispenser" , "Tao pet (anag)" , "Peat to brew leaves in" .)