Stick up only CD of first four, perhaps? (5)
I believe the answer is:
baton
'stick' is the definition.
(term for a stick or staff)
I cannot understand how the remainder of the clue works.
(Other definitions for baton that I've seen before include "A stick for a conductor and policeman" , "Relay runner's stick" , "Light wand" , "Relay race stick" , "Prohibition" .)