The girl who took your coat? (3)
I believe the answer is:
peg
'the girl' is the definition.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for peg that I've seen before include "Hook" , "Wire tensioner" , "The woman" , "The girl to hang your hat on" , "Brandy and soda drink measure" .)