Assumes as one's own? (6)

I believe the answer is:

adopts

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'assumes' is the definition.
('adopt' can be a synonym of 'assume')

I don't understand the rest of the clue.

(Other definitions for adopts that I've seen before include "Approves or accepts, a motion or accounts" , "Takes into one's family legally" , "Takes a child into one's family" , "Takes as one's own, say child" , "Legally takes on (child)" .)

I've seen this clue in The Globe and Mail.

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