Meets cosy form of natural environment (9)
I believe the answer is:
ecosystem
'natural environment' is the definition.
'ecosystem' can be an answer for 'environment' (thesaurus). I'm not sure about the 'natural' bit.
'meets cosy form' is the wordplay.
'form' indicates anagramming the letters (another form of the letters).
'meets'+'cosy'='meetscosy'
'meetscosy' anagrammed gives 'ECOSYSTEM'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for ecosystem that I've seen before include "orderly collection of organisms" , "Biological community with its environment" , "The interaction of a group of organisms with their physical environment" , "Community of organisms and their environment" , "integrated community" .)