Broadcast again revolved around argument that's more bigoted (8)
I believe the answer is:
narrower
'broadcast again revolved around argument that's more' is the definition.
I can't tell whether this defines the answer.
'bigoted' is the wordplay.
I cannot really see how this works, but
'bigoted' could be 'narrow' (I've seen this before) and 'narrow' is present in the answer.
The remaining letters 'er' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for narrower that I've seen before include "Thinner" , "Less wide" , "With less width" .)