Cold, and how, the German soup! (7)
I believe the answer is:
chowder
'soup' is the definition.
(I know that Chowder is a soup)
'cold and how the german' is the wordplay.
'cold' becomes 'c' (eg on taps).
'and' says to put letters next to each other.
'the german' becomes 'der' ('the' in German).
'c'+'how'+'der'='CHOWDER'
(Other definitions for chowder that I've seen before include "Thick fish stew" , "Thick soup containing clams or fish" , "Rich seafood soup" , "Clam stew, soup" , "Fish soup for cowherd" .)