It's on the cards as a patient thing to do (3,4)

I believe the answer is:

get well

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'do' is the definition.
Although both the answer and definition are verbs in their base form, I cannot see how they can define each other.

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for get well that I've seen before include "Recover one's health" , "Recover from illness" .)

I've seen this clue in the Evening Standard.

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