Crossword Genius

(Being) up to date (2,4)

Ross

I believe the answer is:

au fait

(Other definitions for au fait that I've seen before include "Informed, abreast of" , "Fully informed (French)" , "Familiar with - in France" , "Conversant with or knowledgeable about - in France" , "Expert" .)

I've seen this clue in The Guardian.
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