Still in the seventies (4)

I believe the answer is:

even

'still' is the definition.
(I know that still can be written as even)

'in the seventies' is the wordplay.
'in' indicates a hidden word.
'EVEN' is hidden within 'seventies'.

(Other definitions for even that I've seen before include "Plumb" , "Regular - smooth" , "Flat, smooth and divisible by two" , "Still - flat" , "no-win situation?" .)

I've seen this clue in the Evening Standard.

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