Signed (5)
'signed' is the definition.
(as in inking a new contract)
This is all the clue.
(Another definition for inked that I've seen is " black mark perhaps".)
'signed' is the definition.
(endorsing is a kind of signing)
This is all the clue.
(Other definitions for endorsed that I've seen before include "Formally backed" , "Confirmed a statement or signed back of cheque" , "Gave the go-ahead" , "Seconded" , "Officially approved" .)