Crossword Genius

In any case a refusal will not please (5)

Ross

I believe the answer is:

annoy

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'not please' is the definition.
I can't tell whether this definition defines the answer.

'in any case a refusal' is the wordplay.
'in' means one lot of letters goes inside another.
'case a refusal' becomes 'no' (I can't explain this - if you can you should give a lot more credence to this answer).
'any' going around 'no' is 'ANNOY'.

'will' acts as a link.

Can you help me to learn more?

(Other definitions for annoy that I've seen before include "get angry" , "Displease" , "Vex" , "Irritate, nettle" , "Exasperate" .)

I've seen this clue in The Globe and Mail.
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