Easy shot for a poser (6)
I believe the answer is:
sitter
I believe this clue is a double definition.
'easy shot' is the first definition.
(term in various sports)
'for a poser' is the second definition.
(I have seen 'A poser' mean 'sitter' so perhaps 'poser' could also mean 'sitter')
(Other definitions for sitter that I've seen before include "A poser" , "Model - childminder" , "broody type" , "one rarely missed?" , "One minds the baby" .)