Expose unprofessional lawyers before end of case (3,4)
I believe the answer is:
lay bare
'expose' is the definition.
(laying bare is a kind of exposing)
'unprofessional lawyers before end of case' is the wordplay.
'unprofessional' becomes 'lay' (I've seen this before).
'lawyers' becomes 'bar' (I've seen this before).
'before' is a charade indicator (letters next to each other).
'end of' suggests the final letters.
The last letter of 'case' is 'e'.
'lay'+'bar'+'e'='LAY BARE'
(Other definitions for lay bare that I've seen before include "Expose" , "Show clearly, disclose" .)