As OAP, I don't fancy taking on children (8)

I believe the answer is:

adoption

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'taking on children' is the definition.
'adoption' can be an answer for 'taking' (thesaurus). I am not certain of the 'on children' bit.

'as oap i don't fancy' is the wordplay.
'oap i don't' can be anagrammed to 'ADOPTION'.
However, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for adoption that I've seen before include "fostered" , "Endorsement" , "Legal process of taking a child into one's family" , "takeover" , "Process of taking on another's child" .)

I've seen this clue in The Times.

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