full of activity (5)
'full of activity' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for busy that I've seen before include "Without leisure" , "crowded" , "With lots to do" , "Very active; engaged" , "detective" .)
'full of activity' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for abuzz that I've seen before include "Excited (like a hive?)" , "Filled with humming" , "Excitedly" , "In a state of activity" .)