Cool atmosphere hit grain production (5,3)

I believe the answer is:

night air

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'cool atmosphere' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'hit grain production' is the wordplay.
'production' is an anagram indicator.
'hit'+'grain'='hitgrain'
'hitgrain' is an anagram of 'NIGHT AIR'.

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

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