Organisms and their environment seem, somehow, to include cosy street (10)

I believe the answer is:

ecosystems

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'organisms and their environment' is the definition.
I can't tell whether this definition defines the answer.

'seem somehow to include cosy street' is the wordplay.
'somehow' indicates anagramming the letters.
'to include' indicates putting letters inside.
'street' becomes 'st' (abbreviation).
'seem' anagrammed gives 'eems'.
'cosy'+'st'='cosyst'
'eems' placed around 'cosyst' is 'ECOSYSTEMS'.

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I've seen this clue in the Sydney Morning Herald.

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