Getting a daughter by choice rather than haphazardly! (8)

I believe the answer is:

adoption

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'getting' is the definition.
(I know that adoption is a type of appropriation)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for adoption that I've seen before include "ratification" , "formal selection of candidate?" , "means to increase size of family?" , "Process of taking on another's child" , "process to select candidate" .)

I've seen this clue in the Evening Standard.

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