Medium for broadcasting three variations (5)
I believe the answer is:
ether
'medium' is the definition.
(I know that ether is a type of medium)
'broadcasting three variations' is the wordplay.
'three' can be anagrammed to 'ETHER'.
However, I'm unsure how this is indicated.
'for' is the link.
Can you help me to learn more?
(Other definitions for ether that I've seen before include "What's clear" , "Imaginary interstellar medium" , "Volatile solvent" , "Highly flammable liquid once used as an anaesthetic" , "Some were put out by this" .)