Ancestor in sport delivering the goods overseas (10)

I believe the answer is:

containers

I'm a little stuck... Click here to teach me more about this clue!

'the goods overseas' is the definition.
I can't tell whether this definition defines the answer.

'ancestor in sport' is the wordplay.
'sport' indicates an anagram.
'ancestor'+'in'='ancestorin'
'ancestorin' anagrammed gives 'CONTAINERS'.

'delivering' is the link.

Can you help me to learn more?

I've seen this clue in The Irish Times.

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