Conductor's tool (5)
I believe the answer is:
baton
'conductor's tool' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for baton that I've seen before include "Club, stick" , "Relay runner's stick" , "Controller of players" , "Conductor wields it - or a policeman" , "Conductor's wand" .)