Done with silver, English — too old (7)
I believe the answer is:
overage
'too old' is the definition.
(I've seen this before)
'done with silver english' is the wordplay.
'done with' becomes 'over' (similar in meaning as in 'over and done with').
'silver' becomes 'ag' (Ag is the chemical symbol for silver).
'english' becomes 'e' (abbreviation).
'over'+'ag'+'e'='OVERAGE'
(Other definitions for overage that I've seen before include "Older than certain limit" , "Excessively old" , "Too old to qualify or a surplus of goods" , "Too old to be eligible" , "Excess" .)