Nowadays, choose to take something up (5)

I believe the answer is:

adopt

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'take something up' is the definition.
I can't tell whether this definition defines the answer.

'nowadays choose' is the wordplay.
'nowadays' becomes 'ad'.
'choose' becomes 'opt' (I've seen this before).
'ad'+'opt'='ADOPT'

'to' is the link.

Can you help me to learn more?

(Other definitions for adopt that I've seen before include "Formally approve" , "Choose as one's own" , "Assume (attitude)" , "Acquire" , "Take on (another's child)" .)

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