Crossword Genius

Produce island broadcast (3)

Ross

I believe the answer is:

cos

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

This clue could be a double definition.

'produce' is the first definition.
(cos is a kind of produce)

'island broadcast' is the second definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.

Can you help me to learn more?

(Other definitions for cos that I've seen before include "holiday destination" , "Mozart fidelity-test opera" , "Islanders here" , "often associated with sin" , "Senior officers" .)

I've seen this clue in The Mirror.
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