Skin lotion ingredient (4)
I believe the answer is:
aloe
'skin lotion ingredient' 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 "Plant source of purgative drug" , "shrub" , "Genus of bitter herbs" , ". . . . vera, soothing plant" , "has a bitter taste" .)