It's not alright to waste time in a cosy corner (4)
I believe the answer is:
nook
'a cosy corner' is the definition.
(I've seen this before)
'it's not alright' is the wordplay.
'it's not' becomes 'no' (I've seen this in other clues).
'alright' becomes 'OK' (synonyms).
'no'+'ok'='NOOK'
'to waste time in' is the link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for nook that I've seen before include "Corner - narrow recess" , "Sheltered corner" , "Cosy corner" , "Interior angle formed where two walls meet" , "Cubbyhole" .)