Cozy (4)
I believe the answer is:
snug
'cozy' is the definition.
(I know that cozy can be written as snug)
This is the entire clue.
(Other definitions for snug that I've seen before include "Small bar in pub - warm and comfortable" , "Close fitting but comfortable" , "Comfy and cosy like bug in rug" , "Compact" , "Bar parlour - comfortably placed" .)