Quick goodbye to long distance radio (5,4)
I believe the answer is:
short wave
This might be a double definition.
'quick goodbye' is the first definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'long distance radio' is the second definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for short wave that I've seen before include "offering the briefest of farewells?" , "Kind of radio channel like brief tidal movement" , "Like some broadcasts" .)