Clear about the time (5)

I believe the answer is:

overt

'clear' is the definition.
(both can mean apparent or obvious)

'about the time' is the wordplay.
'about' becomes 'over' (both can mean around).
'the time' becomes 't' (abbreviation).
'over'+'t'='OVERT'

(Other definitions for overt that I've seen before include "Trove (anag.)" , "Open and candid" , "not disguised" , "Done or shown openly" , "Open, up front" .)

I've seen this clue in the Evening Standard.

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