Lawyer gets eraser that's cleaner (8)
I believe the answer is:
scrubber
'that's cleaner' is the definition.
(I've seen this before)
'lawyer gets eraser' is the wordplay.
'lawyer' becomes 'sc' (I can't explain this - if you can you should believe this answer much more).
'gets' is a charade indicator (letters next to each other).
'eraser' becomes 'rubber eraser' (rubber eraser is a kind of eraser).
'sc'+'rubber'='SCRUBBER'
Can you help me to learn more?
(Other definitions for scrubber that I've seen before include "One cleaning up" , "Vigorous cleaner; device for purifying gases" , "filthy girl?" , "Wire brush, perhaps" , "One cancels" .)