Verify (7)
'verify' is the definition.
(I know that verify is a more specific form of the action confirm)
This is the entire clue.
(Other definitions for confirm that I've seen before include "Ratify or verify" , "Corroborate" , "Substantiate" , "Provide support for the truth" , "Establish the truth of" .)
'verify' is the definition.
(I know that attest is a more specific form of the action verify)
This is all the clue.
(Other definitions for attest that I've seen before include "Give proof" , "Demonstrate" , "Give evidence in a court of law" , "Swear to" , "University town" .)