Paint-spraying device used by artists and designers (8)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
airbrush
(Other definitions for airbrush that I've seen before include "Doctor photographs etc" , "paint over" , "It's used to enhance a photograph" , "Conceal details" , "Represent as better than in fact - rub hairs (anag)" .)