Compel compliance with (7)
I believe the answer is:
enforce
'compel compliance with' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for enforce that I've seen before include "Insist on" , "Compel compliance with (law)" , "Compel adherence to (a law)" , "Give effect to" , "Compel observation of" .)