Crossword Genius

In which you're simply prepared for anything (9)

Ross

I believe the answer is:

readiness

I'm a little stuck... Click here to teach me more about this clue!

'prepared for anything' is the definition.
'readiness' can be an answer for 'prepared' (I've seen this before). I am unsure of the 'for anything' bit.

'in which you're simply' is the wordplay.
I cannot quite understand how this works, but
'in' is found in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for readiness that I've seen before include "State of being prepared and willing" , "initiative" , "Immediate availability" , "in prepared position" , "Promptitude" .)

I've seen this clue in the Evening Standard.
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