Don't declare wand (5)
I believe the answer is:
baton
'wand' is the definition.
(I know that wand can be written as baton)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for baton that I've seen before include "It's used by a conductor and a policeman" , "Police (or conductor's) stick" , "Staff" , "Conductor's wand" , "A stick for a conductor and policeman" .)