Foreign manger design (6)
I believe the answer is:
german
'foreign' is the definition.
(I've seen this before)
'manger design' is the wordplay.
'design' is an anagram indicator.
'manger' with letters rearranged gives 'GERMAN'.
(Other definitions for german that I've seen before include "European language" , "Hamburger, perhaps" , "Proper name for 2" , "foreign" , "Eg, native to Berlin" .)