New order for valiant European (7)
I believe the answer is:
latvian
'european' is the definition.
(someone from Latvia)
'new order for valiant' is the wordplay.
'new order for' indicates anagramming the letters (I've seen this in other clues).
'valiant' is an anagram of 'LATVIAN'.
(Other definitions for latvian that I've seen before include "From one of the Baltic states" , "Riga resident" , "From one Baltic state" , "Valiant (anag) - from Riga?" , "who lives in ex-Communist country?" .)