Endorsed (6)
'endorsed' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for okayed that I've seen before include "Authorised" , "Informally approved and agreed" , "given thumbs up" , "Allowed" , "Sanctioned" .)
'endorsed' is the definition.
('back' can be a synonym of 'endorse')
This is all the clue.
(Other definitions for backed that I've seen before include "Placed a bet on" , "Supported; reversed" , "Gave support" , "Supported, endorsed" , "Bet on or offered support" .)