Might every second widow wear these in midwestern state? (4)

I believe the answer is:

iowa

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'midwestern state?' is the definition.
(I've seen this in another clue)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for iowa that I've seen before include "US state, three vowels" , "part of United States" , "US state, capital Des Moines" , "'Hawkeye State'" , "US swing electoral state" .)

I've seen this clue in The Irish Times.

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