Silver ring an American scratched -- is Edward worried? (8)
I believe the answer is:
agonised
'worried?' is the definition.
(I've seen this before)
'silver ring an american scratched is edward' is the wordplay.
'silver' becomes 'Ag' (Ag is the chemical symbol for silver).
'ring' becomes 'o' (letter resembling a ring).
'american' becomes 'a' (common abbreviation - e.g. in organisation names).
'scratched' indicates named letters should be taken away (scratch can mean to remove or delete).
'edward' becomes 'ed'.
'an' with 'a' taken out is 'n'.
'ag'+'o'+'n'+'is'+'ed'='AGONISED'
(Other definitions for agonised that I've seen before include "Worried greatly" , "Suffered mental anguish" , "Tormented" , "Did Labour" , "San Diego (anag) - worried intensely" .)