Crossword Genius

Interjection that's archaic, say, in the current era (4)

Ross

I believe the answer is:

egad

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Here is my best explanation:

'interjection that's archaic' is the definition.

'say in the current era' is the wordplay.
'say' becomes 'eg'.
'in the current era' becomes 'ad'.
'eg'+'ad'='EGAD'

Ross

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