One German artist back for Schwarzenegger? (5)
I believe the answer is:
arnie
'schwarzenegger?' is the definition.
(Arnold Schwarzenegger is nicknamed Arnie)
'one german artist back' is the wordplay.
'one german' becomes 'ein' ('one' in German).
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'back' is a reversal indicator.
'ein'+'ra'='einra'
'einra' written backwards gives 'ARNIE'.
'for' acts as a link.
(Other definitions for arnie that I've seen before include "Arnold (abbrev.)" , "Mr Schwarzenegger, familiarly" .)