Soothing gel (4)
I believe the answer is:
aloe
'soothing gel' 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 (4) 5532" , "has a bitter taste" , "Fleshy-leaved plant" , "Bitter drug from a leaf juice" , "Bitter fruit" .)