Warm and cosy (4)
I believe the answer is:
snug
'warm and cosy' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for snug that I've seen before include "Compact" , "Small bar in pub - warm and comfortable" , "Close-fitting and cosy" , "Well protected or concealed" , "Comfortabel with guns" .)