Anger about the start of Germany’s nonsense (5)
I believe the answer is:
bilge
'nonsense' is the definition.
(thesaurus)
'anger about the start of germany's' is the wordplay.
'anger' becomes 'bile'.
'about' is an insertion indicator.
'the start of' indicates taking the first letters.
The first letter of 'germanys' is 'g'.
'bile' enclosing 'g' is 'BILGE'.
(Other definitions for bilge that I've seen before include "bull" , "Rubbish, nonsense; dirty water in ship" , "Rubbish - water in boat" , "Lower part of hull; nonsense" , "Rubbish like waste water in ship" .)