Painting evidently involves a touch of colour (5)
I believe the answer is:
tinge
'colour' is the definition.
(tinge is a kind of colour)
'painting evidently involves' is the wordplay.
'involves' indicates the answer is hidden within the clue.
'TINGE' is hidden within 'painting evidently'.
'a touch of' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for tinge that I've seen before include "Slight tint" , "Suffuse" , "Touch (of colour?)" , "Little bit of colour" , "Slight amount of colour" .)