Wins fight, knocking out leaders. Great perception (7)
I believe the answer is:
insight
'perception' is the definition.
(I know that insight is a type of perception)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for insight that I've seen before include "Special knowledge" , "The ability to perceive the true nature of something" , "Perceptiveness" , "Clear or deep perception of a situation" , "Furniture from Princes Street for" .)