Crossword Genius

Immemorial (7)

Ross

I believe the answer is:

agelong

(Other definitions for agelong that I've seen before include "Existing through history" , "Seeming to have always been so" , "never going away?" , "Almost endless" , "Lasting much time; lag gone (anag.)" .)

I've seen this clue in the King Feature Syndicate.
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