Intense offender, ready to face judge, departs (12)
I believe the answer is:
concentrated
'intense' is the definition.
(similar in meaning)
'offender ready to face judge departs' is the wordplay.
'offender ready' becomes 'concent' (I can't justify this - if you can you should believe this answer much more).
'to face' means one lot of letters go next to another.
'judge' becomes 'rate' (rating is a kind of judging).
'departs' becomes 'd' (common abbreviation e.g. train timetables).
'concent'+'rate'+'d'='CONCENTRATED'
Can you help me to learn more?
(Another definition for concentrated that I've seen is " Focused - made denser".)