Weapon needs new repair (6)
I believe the answer is:
rapier
'weapon' is the definition.
(rapier is a kind of weapon)
'new repair' is the wordplay.
'new' is an anagram indicator.
'repair' anagrammed gives 'RAPIER'.
'needs' acts as a link.
(Other definitions for rapier that I've seen before include "Light sword" , "Straight sword with narrow blade" , "Narrow sword with two-edged blade" , "A small spring flower" , "Straight narrow sword with two edges" .)