Crossword Genius

Musical sound effect radio collaborator brought up (3-3)

Ross

I believe the answer is:

wah-wah

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

'musical sound' is the definition.
'wah wah' can be an answer for 'sound' (I have seen 'Sound of Music' mean 'wah wah' so perhaps 'sound' could also mean 'wah wah'). I'm not certain of the 'musical' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

I've seen this clue in The Guardian.
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