Leave German section (6)
I believe the answer is:
depart
'leave' is the definition.
(I know that leave can be written as depart)
'german section' is the wordplay.
'german' becomes 'de' (language code).
'section' becomes 'part' (synonyms).
'de'+'part'='DEPART'
(Other definitions for depart that I've seen before include "Set out" , "Leave (6)" , "21" , "Start out" , "Petard (anag.)" .)