Approved (8)
'approved' is the definition.
(endorsing is a kind of approving)
This is all the clue.
(Other definitions for endorsed that I've seen before include "Publicly approved" , "Gave approval to" , "Signed one's name to certify" , "Given public approval" , "Approved and backed" .)
'approved' is the definition.
('okay' can be a synonym of 'approve')
This is the entire clue.
(Other definitions for okayed that I've seen before include "Sanctioned" , "Authorised" , "Given the go-ahead" , "Informally approved and agreed" , "Gave informal approval" .)