Shooting target (4,6)
I believe the answer is:
clay pigeon
'shooting target' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for clay pigeon that I've seen before include "hard bird to shoot?" , "Disc fired into the air as target for shooting" , "target of gunmen" , "Trap shooter's target" , "Trap shooting target" .)