The German hides their problem, and he hesitates (8)
I believe the answer is:
ditherer
'he hesitates' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.
'the german hides their problem' is the wordplay.
'the german' becomes 'der' ('the' in German).
'hides' indicates putting letters inside.
'problem' indicates an anagram.
'their' anagrammed gives 'ither'.
'der' placed around 'ither' is 'DITHERER'.
'and' is the link.
Can you help me to learn more?
(Other definitions for ditherer that I've seen before include "Hesitant person" , "Indecisive person" , "person who hesitates" .)