They're relayed in a relay (6)

I believe the answer is:

batons

(Other definitions for batons that I've seen before include "Rods for conductors and police" , "Rods for conductors and coppers" , "Conductors wield them - or policemen" , "With which to conduct" , "Conductors flourish them, or policemen" .)

I've seen this clue in The New York Times.

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