Ceremonial staff of office (4)
I believe the answer is:
mace
'ceremonial staff of office' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for mace that I've seen before include "Tear gas - spice" , "something fragrant" , "Disabling spray" , "Came to get nutmeg spice" , "Ceremonial staff of office" .)