Companion sick? Has turn in icy blow? (5,4)

I believe the answer is:

chill wind

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'icy blow?' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'companion sick? has turn' is the wordplay.
'companion' becomes 'ch' (Companion of Honour).
'sick?' becomes 'ill' (synonyms).
'has' is a charade indicator (letters next to each other).
'turn' becomes 'wind' (I've seen this in another clue).
'ch'+'ill'+'wind'='CHILL WIND'

'in' is the link.

Can you help me to learn more?

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

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