Endure sitting in the German express (7)
I believe the answer is:
deliver
'express' is the definition.
(thesaurus)
'endure sitting in the german' is the wordplay.
'endure' becomes 'live' ('live' can be a synonym of 'endure').
'sitting in' indicates putting letters inside.
'the german' becomes 'der' ('the' in German**).
'live' placed within 'der' is 'DELIVER'.
(Other definitions for deliver that I've seen before include "Transfer and hand over" , "Convey, transport (goods)" , "what the errand boy does" , "Consign" , "bear" .)