Trespass, infringe (8)
I believe the answer is:
encroach
This clue is a double definition.
'trespass' is the first definition.
(I know that encroach is a more specific form of the action the trespass)
'infringe' is the second definition.
(I know that infringe can be written as encroach)
(Other definitions for encroach that I've seen before include "Intrude on someone's property or time" , "Advance beyond proper limit" , "Advance beyond the usual limit" , "Intrude on somebody's territory or time" , "Advance gradually into another's area" .)