Olympic sailing class won by GB's Giles Scott in 2016 and 2021 (4)
I believe the answer is:
finn
(Other definitions for finn that I've seen before include "Scandinavian such as Sibelius" , "hero of English or American novel" , "Trollope's Phineas; one from Tampere" , "Sawyer's friend (from Helsinki?}" , "Northern European" .)