Emergency workers (7)
(Other definitions for fire brigade that I've seen before include "9a 19d" , "Blaze tacklers" , "Organised group to combat conflagrations" , "rescuers" .)
(Other definitions for firemen that I've seen before include "Hose wielder" , "Their job is to extinguish conflagrations" , "Stokers" , "They fight conflagrations" .)