Paints a flag? (7)
I believe the answer is:
colours
I believe this is a double definition.
'paints' is the first definition.
(colouring is a kind of painting)
'a flag?' is the second definition.
(I know that colours is a type of flag)
(Other definitions for colours that I've seen before include "Hues, tints" , "flag" , "Red and blue" , "Shades" .)