Criminal having anxiety in Germany (8)
I believe the answer is:
gangster
'criminal' is the definition.
(gangster is a kind of criminal)
'anxiety in germany' is the wordplay.
'anxiety' becomes 'angst' (Angst is an example).
'in' is an insertion indicator.
'germany' becomes 'ger' (I've seen this in other clues).
'angst' put within 'ger' is 'GANGSTER'.
'having' acts as a link.
(Other definitions for gangster that I've seen before include "One of a group of violent criminals" , "Mafia man" , "Organised criminal" , "Hood, desperado" , "Wise guy" .)