Accedes (7)
I believe the answer is:
assents
'accedes' is the definition.
('assent' can be a synonym of 'accede')
This is all the clue.
(Other definitions for assents that I've seen before include "Expresses agreement" , "Accedes, acquiesces" , "Agrees, complies" , "Says yes" , "Gives nod" .)