Place for a flag pin (5)
I believe the answer is:
lapel
'place for a flag pin' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lapel that I've seen before include "Continuation of a coat collar" , "Jacket fold" , "Fold of coat" , "Lower extension of collar on jacket or coat" , "Turned-back part of coat collar" .)