Crossword Genius

Two-way clash on airwaves (4)

Ross

I believe the answer is:

dual

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'two-way' is the definition.
(I've seen this in another clue)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for dual that I've seen before include "Road with central division" , "Twofold" , "Having two distinct functions" , "Consisting of two parts" , "Double" .)

I've seen this clue in the Sydney Morning Herald.
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