Crossword Genius

Overall owner finding ancestor firm (6,7)

Ross

I believe the answer is:

parent company

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'overall owner' is the definition.
The definition suggests a singular noun which matches the answer.

'ancestor firm' is the wordplay.
'ancestor' becomes 'parent' (parent is a kind of ancestor).
'firm' becomes 'company' (I've seen this before).
'parent'+'company'='PARENT COMPANY'

'finding' is the link.

Can you help me to learn more?

I've seen this clue in The Daily Express.
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