Salicylic acid target (4)
I believe the answer is:
acne
'salicylic acid target' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for acne that I've seen before include "Cane for the teenager?" , "Skin affliction" , "Facial spots" , "Skin spots" , "Teenage skin blemish" .)