Rate VAR in broadcast report (9)
I believe the answer is:
narrative
'report' is the definition.
(narrative is a kind of report)
'rate var in broadcast' is the wordplay.
'broadcast' indicates anagramming the letters (letters scattered or cast around).
'rate'+'var'+'in'='ratevarin'
'ratevarin' is an anagram of 'NARRATIVE'.
(Other definitions for narrative that I've seen before include "Story line" , "relation" , "Story recounting events" , "Storyline" , "Report" .)