Where to hang one's hat (3)
I believe the answer is:
peg
'where to hang one's hat' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for peg that I've seen before include "Small cylindrical pin" , "Member" , "The woman" , "Kind of clip for fastening clothes to line" , "Clothes line pin" .)