A German article about star is in at least two parts (7)
I believe the answer is:
asunder
'in at least two parts' is the definition.
(asunder means torn apart)
'a german article about star' is the wordplay.
'german article' becomes 'der'.
'about' says to put letters next to each other.
'star' becomes 'sun' (Sun is an example).
'der' put after 'sun' is 'sunder'.
'a'+'sunder'='ASUNDER'
'is' acts as a link.
(Other definitions for asunder that I've seen before include "Widely separated" , "Sad rune (anag.)" , "(Rent) apart" , "(Split) into pieces" , "(Split) apart" .)