"Duck, duck ..." follower (5)
I believe the answer is:
goose
'duck duck follower' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for goose that I've seen before include "Christmas bird?" , "Supposedly foolish bird" , "Grab seat" , "Marches in an odd fashion" , "Gander" .)