Two-way clash on airwaves (4)
I believe the answer is:
dual
'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" .)