Plant specified story with a cut (7)
I believe the answer is:
thistle
'plant' is the definition.
(type of plant)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for thistle that I've seen before include "The weed has prickly-edged leaves" , "Scots plant emblem" , "that blows down when it's windy" , "Lithest (anag) - plant" , "Scottish plant emblem" .)