Getting older drink in silver container (5)
I believe the answer is:
aging
'getting older' is the definition.
(I've seen this in another clue)
'drink in silver container' is the wordplay.
I cannot quite see how this works, but
'drink' could be 'gin' (gin is a kind of drink) and 'gin' is present in the answer.
'silver' could be 'ag' (Ag is the chemical symbol for silver) and 'ag' is found in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for aging that I've seen before include "Becoming more grown-up" , "Maturing" , "in decline" , "Getting old" , "development" .)