From 2020, produces scores in sections over short time (7)
I believe the answer is:
bisects
'from 2020 produces scores' is the definition.
I can't judge whether this definition defines the answer.
'in sections over short time' is the wordplay.
'in' is an insertion indicator.
'sections over short' becomes 'bits' (I can't explain this - if you can you should believe this answer much more).
'time' becomes 'sec'.
'bits' placed around 'sec' is 'BISECTS'.
Can you help me to learn more?
(Other definitions for bisects that I've seen before include "Divides into two parts" , "Cuts in half" , "Divides in equal halves" , "Cuts in two" .)