Flower with thorns (4)
I believe the answer is:
rose
'flower with thorns' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rose that I've seen before include "18 [ROSE]" , "Dusky pink" , "was being promoted" , "Thorny plant with bright flowers" , "Adjourned" .)