Poser, easy one (6)
I believe the answer is:
sitter
I believe this is a double definition.
'poser' is the first definition.
(I know that poser can be written as sitter)
'easy one' is the second definition.
(eg an easy shot in football)
(Other definitions for sitter that I've seen before include "One posing for artist" , "Child-minder of sedentary disposition" , "Easy shot or catch" , "Baby minder for pay" , "Child minder, sounds sedentary" .)