Border's batting before break (8)
I believe the answer is:
infringe
'break' is the definition.
(infringing is a kind of breaking)
'border's batting before' is the wordplay.
'border' becomes 'fringe' (fringing is a kind of bordering**).
'batting' becomes 'in'.
'before' means one lot of letters go next to another.
'fringe' put after 'in' is 'INFRINGE'.
(Other definitions for infringe that I've seen before include "Contravene" , "Encroach, impinge" , "Cross boundary" , "Transgress" , "Encroach on (a right)" .)