Living environment meets cosy plan (9)
I believe the answer is:
ecosystem
'living environment' is the definition.
'ecosystem' can be an answer for 'environment' (thesaurus). I am unsure of the 'living' bit.
'meets cosy plan' is the wordplay.
'plan' is an anagram indicator (plan can mean organise).
'meets'+'cosy'='meetscosy'
'meetscosy' with letters rearranged gives 'ECOSYSTEM'.
Can you help me to learn more?
(Other definitions for ecosystem that I've seen before include "integrated community" , "Biological community with its environment" , "The interaction of a group of organisms with their physical environment" , "Community of organisms and their environment" , "orderly collection of organisms" .)