European fine in north? (4)
I believe the answer is:
finn
'european' is the definition.
(someone from Finland)
'fine in north?' is the wordplay.
'fine' becomes 'f' (abbreviation in pencil classifications).
'north?' becomes 'N' (abbreviation).
'f'+'in'+'n'='FINN'
(Other definitions for finn that I've seen before include "hero in American adventures" , "Eg, Helsinki native" , "hero of English or American novel" , "Native of Espoo" , "Sibelius, perhaps" .)