Prickly succulents (5)
I believe the answer is:
cacti
'prickly succulents' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for cacti that I've seen before include "Prickly Pears perhaps" , "they shoot in the desert" , "flowers" , "Tough plants" , "Desert features" .)