Society go off British silver container (6-3)

I believe the answer is:

saddle-bag

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'container' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'society go off british silver' is the wordplay.
'society' becomes 's' (common abbreviation in names of organisations).
'go off' becomes 'addle' (eg an egg might addle).
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'silver' becomes 'ag' ('Ag' can be a synonym of 'silver').
's'+'addle'+'b'+'ag'='SADDLE-BAG'

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I've seen this clue in The Times.

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