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 King Feature Syndicate, the Family Time, the USA Today, The Sun, the Universal, the L.A. Times Daily, The Star Tribune and the Penny Press.

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