Crossword Genius

Most risky district French company's invested in (7)

Ross

I believe the answer is:

diciest

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'most risky' is the definition.
('dicey' can be a synonym of 'risky')

'district french company's invested in' is the wordplay.
'district' becomes 'dit' (I can't explain this - if you can you should give a lot more credence to this answer).
'french company's' becomes 'cie's' (abbreviation of the french 'compagnie').
'invested in' indicates putting letters inside (I've seen this in other clues).
'dit' going around 'cies' is 'DICIEST'.

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