She's writer looking run down (7)
I believe the answer is:
haggard
'down' is the definition.
Both the answer and definition are adjectives. Perhaps there's a link between them I don't understand?
'she's writer looking run' is the wordplay.
I cannot quite see how this works, but
'run' could be 'r' (cricket abbreviation) and 'r' is found within the answer.
'she' could be 'ag' and 'ag' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for haggard that I've seen before include "Farm building for storing crops" , "Showing signs of overwork or suffering" , "She came from him" , "showing lack of sleep" , "Lean" .)