Bisect, cut across (9)
I believe the answer is:
intersect
I believe this is a double definition.
'bisect' is the first definition.
(thesaurus)
'cut across' is the second definition.
(I've seen this before)
(Other definitions for intersect that I've seen before include "Cut across" , "Divide into parts" , "making one cross" , "Criss-cross" , "Meet at a point" .)