Staff of police (9)
I believe the answer is:
truncheon
This could be a double definition.
'staff' is the first definition.
(I've seen this before)
'police' is the second definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'of' is the link.
Can you help me to learn more?
(Other definitions for truncheon that I've seen before include "Policeman's club" , "Police staff" , "Police baton" , "Cosh" , "Police weapon" .)