Part payment a German offered after dash from east (5-2)
I believe the answer is:
trade-in
'part payment' is the definition.
(type of part payment)
'a german offered after dash from east' is the wordplay.
'a german' becomes 'ein' ('a' in German).
'offered after' says to put letters next to each other.
'dash' becomes 'dart' (synonyms).
'from east' shows that the letters should be reversed in order (letters written right to left or 'east to west').
'dart' in reverse letter order is 'trad'.
'ein' put after 'trad' is 'TRADE-IN'.
(Other definitions for trade-in that I've seen before include "Article used in part-exchange" , "Something used in part exchange" , "I daren't (anag)" , "Trained (anag.)" , "Part-exchanged item" .)