OxiClean target (5)
I believe the answer is:
stain
'oxiclean target' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for stain that I've seen before include "Taint" , "Smear" , "Penetrative dye; mark" , "Discolouring mark" , "Discoloration" .)