Old silver coin presumably not counterfeit! (4)

I believe the answer is:

real

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'not counterfeit' is the definition.
(I've seen this in another clue)

I can't explain the remainder of the clue.

(Other definitions for real that I've seen before include "Actual and tangible" , "Unaffected" , "Genuine or existing" , "In America, this estate comprises land and buildings" , "Working together" .)

I've seen this clue in The Sun.

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