It's an unusual usage. The term 'ill wind' normally occurs only in the proverb 'It's an ill wind that blows nobody any good' - everything brings something good to someone. To use another meteorological idiom, 'Every cloud has a silver lining'.
In this case the 'ill wind' doesn't have any good effects; it just means 'malaise', or 'feeling of uneasiness'.
PS Also, I don't see why the author used a hyphen.
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