Crossword Genius

Prince William gestures audibly? They bring us a broadcast (8)

Ross

I believe the answer is:

airwaves

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

'audibly? they bring us a broadcast' is the definition.
The definition suggests an adverb but the answer is not.

'prince william gestures' is the wordplay.
'prince william' becomes 'air' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'gestures' becomes 'waves' (wave is a kind of gesture).
'air'+'waves'='AIRWAVES'

Can you help me to learn more?

(Other definitions for airwaves that I've seen before include "Radio broadcasts across them" , "Broadcasting frequencies" , "Medium through which radio signals are transmitted" , "Means of broadcasting" .)

I've seen this clue in The Guardian.
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