Lack of clarity as court brought up sinister point (10)

'lack of clarity' is the definition.
The definition suggests a singular noun which matches the answer.

'as court brought up sinister point' is the wordplay.
I cannot quite see how this works, but
'as' could be 'in' (I've seen this in other clues) and 'in' is present in the answer.
'court' could be 'woo' (both can mean to romance someone) and 'woo' is found within the answer.
'sinister' could be 'l' (short for left - 'sinister' is 'left' in Latin) and 'l' is found within the answer.
'point' could be 's' (South) and 's' is located in the answer.
The remaining letters 'les' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?