Stuck on two of the down-clues 1 System of exceptionally zealous production, in the former USSR (12) S?A?H?N???S? 20 A supporting comedian in vaudeville (6,6) ???O?D : ?A?I?A (second?)
Mnay thanks: Stakhanovism fits
voluntary system in former USSR of increasing production through hard work, efficiency, teamwork, and competition. Stakhanovite, n. worker honoured for success in the system.