A quiet ring with charm (6)
I believe the answer is:
appeal
'charm' is the definition.
('appeal' can be a synonym of 'charm')
'a quiet ring' is the wordplay.
'a quiet' becomes 'ap' (I've seen this in other clues).
'ring' becomes 'peal' ('peal' can be a synonym of 'ring'**).
'ap'+'peal'='APPEAL'
'with' acts as a link.
(Other definitions for appeal that I've seen before include "Seek to overturn verdict in higher court" , "Earnest or urgent request" , "fetching" , "Urgent or formal request for help" , "Earnest or urgent equest" .)