Charge that is right for sword (6)
I believe the answer is:
rapier
'sword' is the definition.
(rapier is a kind of sword)
'charge that is right' is the wordplay.
'charge' becomes 'rap' (I have seen 'Criminal charge ' mean 'rap' so perhaps 'charge' could also mean 'rap').
'that is' becomes 'ie' ('i.e.' can be a synonym of 'that is').
'right' becomes 'r' (common abbreviation).
'rap'+'ie'+'r'='RAPIER'
'for' is the link.
(Other definitions for rapier that I've seen before include "Narrow sword with two-edged blade" , "Sword for thrusting" , "Light sword" , "Thrusting weapon" , "A fencing sword for repair" .)