Crossword Genius

Manuscript that can make a fool out of one (5)

Ross

I believe the answer is:

folio

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

'manuscript that' is the definition.
'folio' can be an answer for 'manuscript' (I've seen this before). I am unsure of the rest of the definition.

'make a fool out of one' is the wordplay.
'make' indicates an anagram.
'out of' means one lot of letters goes inside another.
'one' becomes 'i' (Roman numeral).
'fool' anagrammed gives 'folo'.
'folo' going around 'i' is 'FOLIO'.

'can' acts as a link.

Can you help me to learn more?

(Other definitions for folio that I've seen before include "eaf" , "outsize book" , "Leaf of paper" , "Book made of folded sheets" , "Two-leaf sheet" .)

I've seen this clue in the Evening Standard.
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