Tout Seine , after translation, to become German (9)

I believe the answer is:

teutonise

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'become german' is the definition.
I can't judge whether this definition defines the answer.

'tout seine after translation' is the wordplay.
'after' says to put letters next to each other.
'translation' indicates anagramming the letters.
'tout'+'seine'='toutseine'
'toutseine' with letters rearranged gives 'TEUTONISE'.

'to' acts as a link.

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