In practice, whatever you do (3)

I believe the answer is:

act

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'you do' is the definition.
'act' can be an answer for 'do' (I've seen this before). I'm not certain of the 'you' bit.

'in practice whatever' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ACT' is hidden in the letters of 'practice whatever'.

Can you help me to learn more?

(Other definitions for act that I've seen before include "law passed" , "Feign" , "Do something, in a play?" , "work" , "Perform(ance)" .)

I've seen this clue in the Evening Standard.

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