Winter illness (3)

I believe the answer is:

flu

'winter illness' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for flu that I've seen before include "Common infection" , "A bad winter bug" , "Infection reduced" , "Highly contagious viral disease" , "Winter ailment" .)

I've seen this clue in the Penny Press, the L.A. Times Daily, The Sun, the Family Time, the USA Today, the Universal, The Star Tribune and the King Feature Syndicate.

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