Second name given by German causing surprise (7)
I believe the answer is:
stagger
'surprise' is the definition.
(thesaurus)
'second name given by german' is the wordplay.
'second' becomes 's' (common abbreviation).
'name' becomes 'tag' (I've seen this in other clues**).
'given' says to put letters next to each other.
'by' says to put letters next to each other.
'german' becomes 'ger' (abbreviation).
's'+'tag'+'ger'='STAGGER'
'causing' is the link.
(Other definitions for stagger that I've seen before include "Reel; arrange so as to be out of line" , "Teeter" , "Lurch; astound" , "Pitch" , "Reel - astound" .)