A painted dolly! (6)
I believe the answer is:
sitter
'dolly' is the definition.
(both can mean an easy catch in cricket)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for sitter that I've seen before include "broody type" , "Extremely easy task" , "one rarely missed?" , "Artist's model or child's minder" , "easy target" .)