Clay pigeon, for one (6)
I believe the answer is:
target
'clay pigeon for one' is the definition.
(I know that clay pigeon is a type of target)
This is all the clue.
(Other definitions for target that I've seen before include "Goal to be aimed for" , "Mark to aim at" , "Thing aimed at" , "Object of attack" , "Reference point to shoot at" .)