Memorable time (3)

I think it could be either:

Which length description are you looking for?:

3-6,3

era

'memorable time' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for era that I've seen before include "generation, maybe" , "Stage" , "Aeon" , "day" , "Geological period" .)

I've seen this clue in The Wall Street Journal, The New York Times, the Universal, the King Feature Syndicate and The Star Tribune.

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