Broadcast precedes rant in part of magazine (6,6)
I believe the answer is:
centre spread
'part of magazine' is the definition.
'broadcast precedes rant' is the wordplay.
'broadcast' indicates an anagram.
'precedes'+'rant'='precedesrant'
'precedesrant' anagrammed gives 'CENTRE SPREAD'.
'in' is the link.
(Other definitions for centre spread that I've seen before include "Pair of facing pages in the middle of a magazine" , "nude photograph?" , "Part of newspaper" , "Magazine's middle pages" , "magazine feature" .)