Not social, I ruined alliances (10)

I believe the answer is:

coalitions

'alliances' is the definition.
('coalition' can be a synonym of 'alliance')

'not social i ruined' is the wordplay.
'ruined' is an anagram indicator.
'not'+'social'+'i'='notsociali'
'notsociali' is an anagram of 'COALITIONS'.

(Another definition for coalitions that I've seen is " Alliances".)

I've seen this clue in The Telegraph.

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