Means it's breaking the law (6)
I believe the answer is:
wealth
'means' is the definition.
(thesaurus)
'breaking the law' is the wordplay.
'breaking' indicates an anagram.
'the'+'law'='thelaw'
'thelaw' anagrammed gives 'WEALTH'.
'it's' is the link.
(Other definitions for wealth that I've seen before include "Possessions and resources" , "Prosperity" , "Material worth" , "An abundance of valuable possessions or money" , "was common under Cromwell" .)