Violate (8)
'violate' is the definition.
(I know that infringe is a more specific form of the action the violate)
This is all the clue.
(Other definitions for infringe that I've seen before include "Contravene" , "Neglect to obey" , "Refining so as to act against rule or agreement" , "Cross boundary" , "Break (rule)" .)
'violate' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for defile that I've seen before include "Contaminate" , "Fed lie to pollute" , "valley" , "Spoil; steep-sided gorge" , "Befoul" .)