Heroic Peston broadcast on two channels (12)

I believe the answer is:

stereophonic

'on two channels' is the definition.

'heroic peston broadcast' is the wordplay.
'broadcast' indicates anagramming the letters.
'heroic'+'peston'='heroicpeston'
'heroicpeston' is an anagram of 'STEREOPHONIC'.

(Other definitions for stereophonic that I've seen before include "Combining separate sources of sound" , "through two channels" , "(Of sound) multi-channel" .)

I've seen this clue in The Independent.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.