Force members to uphold the law (9)
I believe the answer is:
policemen
This clue might be a double definition.
'force members' is the first definition.
(members of the police force)
'uphold the law' is the second definition.
I know that 'uphold the law' relates to this answer.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for policemen that I've seen before include "Officers of the law" , "Gardai, gendarmes" , "some such secret?" , "Coppers, guards" .)