Stick to association (4)
I believe the answer is:
club
I believe this is a double definition.
'stick' is the first definition.
(club is a kind of stick)
'association' is the second definition.
(I've seen this before)
'to' acts as a link.
(Other definitions for club that I've seen before include "Kind of weapon or golf stick" , "woman expects to be in" , "sort of sandwich" , "Good meeting-place" , "Association - bludgeon" .)