### Clue: Row in church about infighting among Provos (9)
### Answer: CHARIVARI 
 ### Explanation: Definition: Row
 CH(abbrev. for "church") + **reversal of**(about) [ I.R.A.(abbrev. for the Provisional Irish Republican Army aka the Provos) V(abbrev. for "versus";fighting against) I.R.A.](… infighting) .
Answer: A din, from the discordant mock serenade played on pots and pans as a joke on newly-weds.