Boundary measure (4)
I believe the answer is:
mete
This clue is a double definition.
'boundary' is the first definition.
(thesaurus)
'measure' is the second definition.
(thesaurus)
(Other definitions for mete that I've seen before include "Administer or hand out" , "Give as due - say punishment" , "Apportion" , "Dispense, give (out)" , "To - out is to dispense (eg, justice)" .)