Implement law breaking (3)
I believe the answer is:
awl
'implement' is the definition.
(awl is a kind of implement)
'law breaking' is the wordplay.
'breaking' is an anagram indicator.
'law' with letters rearranged gives 'AWL'.
(Other definitions for awl that I've seen before include "leather-workers use it" , "Hide sticker" , "Law about a drilling tool" , "Pointed hand tool" , "Boring tool sounds comprehensive" .)