Relieved of anxiety (9)
I believe the answer is:
reassured
'relieved of anxiety' is the definition.
('reassure' can be a synonym of 'relieve of anxiety')
This is all the clue.
(Other definitions for reassured that I've seen before include "Confirmed" , "confident" , "Freed from anxiety" , "Comforted" , "Relieved of anxiety" .)