She may be hanging on the line (3)
I believe the answer is:
peg
'she' is the definition.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for peg that I've seen before include "Clip for attaching clothes to line" , "Wooden pin, small marker" , "The woman" , "Kind of clip for fastening clothes to line" , "The girl to hold a hat" .)