Restraint from some at business after re-organisation (14)

I believe the answer is:

abstemiousness

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'restraint' is the definition.
(abstemiousness is a kind of restraint)

'some at business after re-organisation' is the wordplay.
'some at business' anagrams to 'ABSTEMIOUSNESS'.
But, I'm not clear how the anagram is indicated.

'from' is the link.

Can you help me to learn more?

I've seen this clue in The Guardian.

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