Brummie, no good house painter! (6)
I believe the answer is:
ingres
'painter' is the definition.
(I know that Ingres is a painter)
'brummie no good house' is the wordplay.
'brummie' becomes 'I' (where the crossword setter is 'Brummie').
'no good' becomes 'ng' (abbreviation).
'house' becomes 'res' (I am not sure about this - if you are sure you should believe this answer much more).
'i'+'ng'+'res'='INGRES'
Can you help me to learn more?
(Other definitions for ingres that I've seen before include "French artist" , "French classical painter" , "Producer of old pictures" , "French painter known for his portraits" , "Jean -; Fr. artist; singer (anag.)" .)