Season isn't finished for first team in Rush (6)
I believe the answer is:
sprint
'rush' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for sprint that I've seen before include "Run rapidly" , "Short fast race" , "Quick dash" , "Short race at full speed" , "Run quickly" .)