Weapons for small quarrel (6)
I believe the answer is:
swords
'weapons' is the definition.
(sword is a kind of weapon)
'small quarrel' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'quarrel' becomes 'words' ('words' can be a synonym of 'quarrel').
's'+'words'='SWORDS'
'for' acts as a link.
(Other definitions for swords that I've seen before include "Thrusting weapons" , "Eg, rapiers, sabres" , "Weapons; a Tarot suit" , "Bladed weapons in north Dublin" , "Fighting blades" .)