I have a fifty-fifty arrangement? Well no! (3)

I believe the answer is:

ill

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'arrangement? well no' is the definition.
I can't judge whether this definition defines the answer.

'i have a fifty-fifty' is the wordplay.
'have' says to put letters next to each other.
'a fifty-fifty' becomes 'LL' (L is 50 in Roman numerals).
'i'+'ll'='ILL'

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(Other definitions for ill that I've seen before include "Ailing" , "Badly - in need of medical care" , "Poorly" , "Infirm" , "In a bad way" .)

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

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