One of two standard Soviet tools (6)
I believe the answer is:
sickle
'one of two standard' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for sickle that I've seen before include "Crescent-shaped hand tool for cutting corn" , "Tool for cutting grain" , "field-worker being a trimmer" , "Grass-cutting implement" , "Tool for cutting grass or crops" .)