New rose turned out to be European (5)
I believe the answer is:
norse
'to be european' is the definition.
(I've seen this before)
'new rose turned' is the wordplay.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'turned' is an anagram indicator.
'rose' with letters rearranged gives 'orse'.
'n'+'orse'='NORSE'
'out' acts as a link.
(Other definitions for norse that I've seen before include "Language - senor! (anag)" , "Family of Germanic languages spoken in Scandinavia and Iceland" , "Viking" , "Northern European" , "Old form of Norwegian" .)