Nature spews out different environments (8,3)
I believe the answer is:
pastures new
'different environments' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'nature spews out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'nature'+'spews'='naturespews'
'naturespews' with letters rearranged gives 'PASTURES NEW'.
Can you help me to learn more?
(Other definitions for pastures new that I've seen before include "fresh experiences" , "complete change of scenery" , "a more promising situation" .)