Clue: Those making rowdy brawls from fairy lights, perhaps? (11)
Answer: SPOONERISMS
Explanation: Definition: Those making rowdy brawls from fairy lights, perhaps
"Lairy fights", which could mean "rowdy brawls", is a spoonerism of "fairy lights". In the absence of other wordplay and the crucial checking letter, I wondered if this could be SPOONERISTS, but there seems to be no such word