Crossword Genius

Clear, all the actors in show (9)

Ross

I believe the answer is:

broadcast

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'show' is the definition.
(broadcast is a kind of show)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for broadcast that I've seen before include "Transmit over airwaves" , "Transmit (programme)" , "Transmission" , "Transmit by radio or TV" , "Send out over the airwaves" .)

I've seen this clue in The Telegraph.
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