Crossword Genius

Old-fashioned; no longer used in modern speech (7)

Ross

I believe the answer is:

archaic

(Other definitions for archaic that I've seen before include "Antiquarian" , "Very old or old-fashioned" , "Ancient, no longer current" , "No longer in general use" , "Behind the times" .)

I've seen this clue in the Sydney Morning Herald.
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