Crossword Genius

Dreaded activity programmed for entertainment! (5)

Ross

I believe the answer is:

radio

I'm a little stuck... Click here to teach me more about this clue!

'dreaded' is the definition.
Although both the answer and definition are adjectives, I don't understand how one could define the other.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for radio that I've seen before include "Communications medium" , "Communicate with" , "Sound broadcasting" , "Broadcasting medium" , "Electronic medium of communication" .)

I've seen this clue in The Irish Independent.
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