Crossword Genius

At a former time, completed cursory examination (4-4)

Ross

I believe the answer is:

once-over

'cursory examination' is the definition.
(I've seen this before)

'at a former time completed' is the wordplay.
'at a former time' becomes 'once' (I've seen this before).
'completed' becomes 'over' ('over' can be a synonym of 'completed').
'once'+'over'='ONCE-OVER'

(Other definitions for once-over that I've seen before include "Rapid inspection" , "Quick appraisal" , "Cursory examination" , "Quick inspection" , "Quick survey" .)

I've seen this clue in The Times.
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