Colour of apple shown by Monet? (5)
I believe the answer is:
lemon
'colour' is the definition.
(lemon is a kind of colour)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for lemon that I've seen before include "Dab" , "Fruit-tree" , "leaving bitter taste?" , "Sharp-tasting fruit" , "very different from peach?" .)