One monitoring offender — chosen right, I can’t go out (10,3)

'can't go out' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'one monitoring offender chosen right i' is the wordplay.
I cannot quite understand how this works, but
'one' could be 'i' (Roman numeral) and 'i' is found within the answer.
'chosen' could be 'elect' ('elect' as an adjective can mean chosen) and 'elect' is found in the answer.
'right' could be 'r' (common abbreviation) and 'r' is present in the answer.
'i' could be 'a' and 'a' is located in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?