Expel from the practice of law (6)
I believe the answer is:
disbar
'expel from the practice of law' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for disbar that I've seen before include "Disqualify from practising law" , "Deprive barrister of the right to practise law" , "Deprive of the rights of a barrister" , "Ban" , "Expel from the practice of law" .)