Small brooch or badge (3)
I believe the answer is:
pin
I believe this clue is a double definition.
'small brooch' is the first definition.
(I've seen this before)
'badge' is the second definition.
(I've seen this in another clue)
(Other definitions for pin that I've seen before include "Stick with flag placed in golf hole" , "Small brooch; skittle" , "Cashpoint code" , "Hold (down)" , "Number allocated for electronic transactions" .)