She left fellow to create ledge (5)
I believe the answer is:
shelf
'ledge' is the definition.
(I know that ledge can be written as shelf)
'she left fellow' is the wordplay.
'left' becomes 'l' (common abbreviation).
'fellow' becomes 'F' (abbreviation - of a society etc.).
'she'+'l'+'f'='SHELF'
'to create' acts as a link.
(Other definitions for shelf that I've seen before include "Wall fitting for books, etc" , "display" , "Support for holding objects" , "Horizontal surface to put things on" , "Rock ledge; underwater bank" .)