Crossword Genius

Broadcast a trio playing, not from a ground network (3-2-3)

Ross

I believe the answer is:

air-to-air

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

'not from a ground network' is the definition.
I can't tell whether this defines the answer.

'broadcast a trio playing' is the wordplay.
'broadcast' becomes 'air' (to air on TV).
'playing' is an anagram indicator.
'a'+'trio'='atrio'
'atrio' anagrammed gives 'toair'.
'air'+'toair'='AIR-TO-AIR'

Can you help me to learn more?

(Another definition for air-to-air that I've seen is " Like some missiles".)

I've seen this clue in The Independent.
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