She, jilted, abandoned by Ted, has left (4)
I believe the answer is:
jill
'she' is the definition.
'jilted abandoned by ted has left' is the wordplay.
'abandoned by' is a deletion indicator.
'has' is a charade indicator (letters next to each other).
'left' becomes 'l' (common abbreviation).
'jilted' with 'ted' taken away is 'jil'.
'jil'+'l'='JILL'
(Other definitions for jill that I've seen before include "Jack's nursery rhyme girl companion" , "Jack's pet" , "Female ferret" .)