Crossword Genius

Long, long time (3)

Ross

I believe the answer is:

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

This is all the clue.

(Other definitions for eon that I've seen before include "billion years" , "Immense period" , "Prolonged period" , "plenty of time" , "Long period of time" .)

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