Not being in on the picture, organisation is set up for a fall (8)

I believe the answer is:

unframed

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'not being in on the picture organisation' is the definition.
I can't judge whether this defines the answer.

'is set up for a fall' is the wordplay.
'is set up' becomes 'framed' (I've seen this before).
'for' is a charade indicator (letters next to each other) (I've seen this in other clues).
'a fall' becomes 'un' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'framed' put after 'un' is 'UNFRAMED'.

Can you help me to learn more?

I've seen this clue in the Irish Times (Crosaire) and the Irish Times.

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