Just one scrap can get fighters confused! (5)
I believe the answer is:
melee
'just one scrap' is the definition.
'melee' can be an answer for 'scrap' (I've seen this in another clue). I'm not certain of the 'just one' bit.
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for melee that I've seen before include "Confused conflict, affray" , "Affray; muddled group" , "confused group" , "Skirmish" , "Rumpus" .)