Crossword Genius

Bring-a-bottle party? Afraid not (2,3,2)

Ross

I believe the answer is:

no can do

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

'bring-a-bottle party?' is the definition.
(I've seen this before)

'afraid not' is the wordplay.
I cannot really see how this works, but
'not' could be 'no' (I've seen this in other clues) and 'no' is located in the answer.
The remaining letters 'cando' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for no can do that I've seen before include "Bring-a-bottle party?" , "Nothing manageable" , "off-putting response" , "Impossible, I'm afraid!" , "Informal expression of refusal" .)

I've seen this clue in The Everyman puzzle in The Observer.
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