Police prize (5)
I believe the answer is:
force
This clue is a double definition.
'police' is the first definition.
(the force can refer to the police force)
'prize' is the second definition.
(thesaurus)
(Other definitions for force that I've seen before include "Body of e.g. police" , "Physical coercion" , "Dynamism" , "Northern waterfall" , "fall" .)