Criminal charge that is right for weapon that is used to attack (6)
I believe the answer is:
rapier
'weapon that is used to attack' is the definition.
'rapier' can be an answer for 'weapon' (rapier is a kind of weapon). I am not sure about the remainder of the definition.
'criminal charge that is right' is the wordplay.
'criminal charge' becomes 'rap' (as in taking the rap for something).
'that is' becomes 'ie' (short for Latin 'id est', 'that is').
'right' becomes 'r' (common abbreviation).
'rap'+'ie'+'r'='RAPIER'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for rapier that I've seen before include "A small spring flower" , "Thrusting weapon" , "Light sword" , "A thin double-edged sword" , "Fine-bladed sword" .)