Crossword Genius

Spare time not disguised (5)

Ross

I believe the answer is:

overt

'not disguised' is the definition.
(I've seen this before)

'spare time' is the wordplay.
'spare' becomes 'over' (left over).
'time' becomes 't' (abbreviation).
'over'+'t'='OVERT'

(Other definitions for overt that I've seen before include "Openly displayed" , "Open, not secret or hidden" , "Done in an obvious way" , "Obvious, patent" , "Clear" .)

I've seen this clue in The Times.
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