She's a fixer (3)
I believe the answer is:
peg
'she's' is the definition.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for peg that I've seen before include "The girl to hold a hat" , "The girl to hang your hat on" , "Brandy and soda drink measure" , "Clothes line fastener" , "Small dowel" .)