Certain days are for women (4)

I believe the answer is:

eves

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This clue could be a double definition.

'certain days' is the first definition.
'eves' can be an answer for 'days' (eve is a kind of day). I am unsure of the 'certain' bit.

'for women' is the second definition.
(Eve is an example)

'are' is the link.

Can you help me to learn more?

(Another definition for eves that I've seen is " Early ladies of the nights before".)

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