Soothing plant (4)
I believe the answer is:
aloe
'soothing plant' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for aloe that I've seen before include "Succulent plant (may be bitter!)" , "Fleshy-leaved plant" , "Succulent plant (4) 5532" , "has a bitter taste" , "Bitter drug from a leaf juice" .)