In painting, every shade is required (5)
I believe the answer is:
tinge
'is required' is the definition.
I can't judge whether this definition defines the answer.
'in painting every shade' is the wordplay.
'in' says the answer is hidden in the clue.
'TINGE' is hidden in the letters of 'painting every shade'.
Can you help me to learn more?
(Other definitions for tinge that I've seen before include "A shade or a nuance" , "suggestion" , "A smack" , "Little bit of colour" , "Touch (of colour?)" .)