Noticeable new coat? (5)
I believe the answer is:
paint
'coat?' is the definition.
(paint is a kind of coat)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for paint that I've seen before include "Use a brush on canvas" , "Daub" , "Item used by 23 Across" , "Surface coating or decoration" , "Colouring substance" .)