Into pieces like a French and German article (7)
I believe the answer is:
Here is my best explanation:
'into pieces' is the definition.
('asunder' can be a synonym of 'into pieces')
'like a french and german article' is the wordplay.
'like' becomes 'as'.
'a french' becomes 'un' ('a' in French).
'and' says to put letters next to each other.
'german article' becomes 'der'.
(Other definitions for asunder that I've seen before include "(Split) into pieces", "Into parts or pieces", "In pieces", "going to pieces", "being in two", "(Torn) into parts", "Apart - in pieces", "(Split) apart", "Separated" and "(Break) apart".)