Regressive libertarian often accommodated during broadcast (5)

'during broadcast' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'regressive libertarian often accommodated' is the wordplay.
'regressive' says the letters should be written in reverse (to regress is to go backwards).
'accommodated' indicates a hidden word (I've seen 'accommodates' mean this).
'riano' is hidden in the letters of 'libertarian often'.
'riano' back-to-front is 'ONAIR'.

Can you help me to learn more?