Time before Xmas that’s sure to broadcast exciting stories (10)
I believe the answer is:
adventures
'exciting stories' is the definition.
(tales of adventure)
'time before xmas that's sure to broadcast' is the wordplay.
'time before xmas' becomes 'advent' (advent is the period leading up to Christmas Day).
'that's' is a charade indicator (letters next to each other).
'to broadcast' is an anagram indicator (letters scattered or cast around).
'sure' anagrammed gives 'ures'.
'advent'+'ures'='ADVENTURES'
(Other definitions for adventures that I've seen before include "Escapades" , "Exploits" , "Exciting undertakings" , "Risky undertakings" , "Dangerous undertakings" .)