Cut conclusion though judgement was not unanimous (5,8)
I believe the answer is:
split decision
'cut conclusion' is the definition.
'split decision' can be an answer for 'conclusion' (split decision is a kind of conclusion). I am not certain of the 'cut' bit.
'judgement was not unanimous' is the wordplay.
I cannot really see how this works, but
'judgement' could be 'decision' (decision is a kind of judgement) and 'decision' is found within the answer.
The remaining letters 'split' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'though' acts as a link.
Can you help me to learn more?
(Another definition for split decision that I've seen is " Majority verdict".)