She's not improved by the golden touch (4)
I believe the answer is:
lily
'she's' is the definition.
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for lily that I've seen before include "Trumpet-shaped flowering plant" , "Plant like an amaryllis" , "Type of flower" , "Flower; girl's name" , "Flowering bulb" .)