This person, volunteer with upturned collar, kind of European (7)
I believe the answer is:
italian
'kind of european' is the definition.
'this person volunteer with upturned collar' is the wordplay.
'this person' becomes 'i'.
'volunteer' becomes 'ta' (member of the Territorial Army, volunteer regiment).
'with' is a charade indicator (letters next to each other).
'upturned' says the letters should be written backwards.
'collar' becomes 'nail' (synonyms).
'nail' written backwards gives 'lian'.
'i'+'ta'+'lian'='ITALIAN'
(Other definitions for italian that I've seen before include "Roman native" , "(Meal in a) pizzeria" , "Southern European" , "Neapolitan, for example" , "Berlusconi's tongue" .)