Published French article on Welsh criminal (6)
I believe the answer is:
outlaw
'criminal' is the definition.
(I know that criminal can be written as outlaw)
'published french article on welsh' is the wordplay.
'published' becomes 'out' (I've seen this in other clues).
'french article' becomes 'la' (definite article in French).
'on' means one lot of letters go next to another.
'welsh' becomes 'W' (abbreviation).
'out'+'la'+'w'='OUTLAW'
(Other definitions for outlaw that I've seen before include "Irish Tory" , "Ban, make illegal" , "Declare illegal" , "Bandit or fugitive from justice" , "Robin Hood, for one" .)