Group of Girl Scouts (5)
I believe the answer is:
troop
'group of girl scouts' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for troop that I've seen before include "Flock, crowd" , "Flock, large group" , "Body of soldiery" , "Group of people or animals" , "Force" .)