Defendant doomed, wanting introduction to Rumpole (7)
I believe the answer is:
accused
'defendant' is the definition.
(synonyms)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for accused that I've seen before include "One tried" , "Levelled a charge against" , "Charged with an offence" , "Person being charged" , "Incriminated" .)