Adopt American English (3)

I believe the answer is:

use

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'adopt' is the definition.
The answer and definition can be both to do with social activities as well as being verbs in their base form.
Maybe there's a link between them I don't understand?

'american english' is the wordplay.
'american' becomes 'us'.
'english' becomes 'e' (abbreviation).
'us'+'e'='USE'

Can you help me to learn more?

(Other definitions for use that I've seen before include "Take drugs regularly" , "Employment; utilise" , "Benefit" , "Consume; deploy" , "Function, purpose" .)

I've seen this clue in The Times.

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