Officers' money (5)
I believe the answer is:
brass
I believe this is a double definition.
'officers'' is the first definition.
(I've seen this in another clue)
'money' is the second definition.
(brass can informally mean money)
(Other definitions for brass that I've seen before include "Alloy; money" , "Instruments, alloy" , "Baggage" , "Yellow alloy" , "cash" .)