Sawyer's pal who lives in Helsinki? (4)
I believe the answer is:
finn
This clue is a double definition.
'sawyer's pal' is the first definition.
(Huckleberry Finn in Mark Twain novel)
'who lives in helsinki?' is the second definition.
(someone from Finland)
(Other definitions for finn that I've seen before include "Scandinavian such as Sibelius" , "adventurer in Mark Twain story" , "Huckleberry - -" , "hero of American fiction" , "EU statesman" .)