The arrow from the cross-bow will make a row (7)
I believe the answer is:
quarrel
'the arrow' is the definition.
(quarrel is a kind of arrow)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for quarrel that I've seen before include "Argument; arrow" , "Angry disagreement" , "A row or major difference" , "Angry argument" , "Spat" .)