
1) Art movement
Found on
https://www.crosswordclues.com/clue/proletkult

Proletkult (Пролетку́льт), a portmanteau of the Russian words `proletarskaya kultura` (proletarian culture), was an experimental Soviet artistic institution which arose in conjunction with the Russian Revolution of 1917. This organization, a federation of local cultural societies and avant-garde artists, was most prominent in the vis.....
Found on
http://en.wikipedia.org/wiki/Proletkult

Proletarian culture movement initiated before 1917 and assuming semi-official status in early Soviet period; it was closed by Lenin in 1922.
Found on
http://soviethistory.msu.edu/glossary/
No exact match found.