Scrap arrow (7)
I believe the answer is:
quarrel
I believe this clue is a double definition.
'scrap' is the first definition.
(thesaurus)
'arrow' is the second definition.
(quarrel is a kind of arrow)
(Other definitions for quarrel that I've seen before include "fight" , "Argue toss" , "Row - crossbow arrow" , "Argument; arrow" , "Wrangle, fall out" .)