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Ross

I believe the answer is:

ancient

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'greek' is the definition.
(Ancient Greek is an example)

I cannot understand how the rest of the clue works.

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(Other definitions for ancient that I've seen before include "Antique, old" , "Old salt in Coleridge's poem" , "Bygone" , "Very old, like the poetic mariner" , "Very old, belonging to times long ago" .)

I've seen this clue in The Sun.
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