Gaggle members (5)
I believe the answer is:
geese
'gaggle members' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for geese that I've seen before include "Large water birds" , "Birds in a gaggle" , "They're seen in a gaggle" , "Proverbially silly birds" , "Birds that fly in a skein" .)