Benzoyl peroxide target (4)
I believe the answer is:
acne
'benzoyl peroxide 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 "Facial spots" , "Spotty skin condition" , "Skin rash" , "Spotty coverage" , "Spotty complaint" .)