Scots emblem (7)
I believe the answer is:
thistle
'scots emblem' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for thistle that I've seen before include "Scots plant emblem" , "Scots national emblem" , "The weed has prickly-edged leaves" , "Prickly weed" , "Prickly plant (Carduus)" .)