Clue: TV and papers ousting leader of party before fight (5,3)
Answer: IDIOT BOX
Explanation: Definition: TV
 ID(short for identity papers) + "riot"(a party, specifically an occasion of boisterous merry-making) **minus ****its 1st letter**(ousting leader of …) **plus**(before) BOX(to fight with one's fists).
Defn: Informal term for a …