Workers' home (7)
(Other definitions for hive that I've seen before include "where people are busy" , "Colony of bees" , "Apiary abode" , "Insects' home - site of much activity" , "home of queen" .)
(Other definitions for anthill that I've seen before include "lots of workers" , "Scene of great activity" , "Home for social workers?" , "There's much work to be done here" , "Mountain (of insects)" .)