Ménages à trois seem to her at odds with society (10)

I believe the answer is:

threesomes

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'menages a trois' is the definition.
I can't tell whether this definition defines the answer.

'seem to her at odds with society' is the wordplay.
'at odds with' indicates anagramming the letters.
'society' becomes 's' (common abbreviation in names of organisations).
'seem'+'to'+'her'='seemtoher'
'seemtoher' mixed up with 's' can make 'THREESOMES'.

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I've seen this clue in The Independent.

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