Snooker players don’t see them as colours (4)
I believe the answer is:
reds
This clue might be a double definition.
'snooker players don't see them' is the first definition.
I know that 'snooker' relates to this answer.
'colours' is the second definition.
(red is a kind of colour)
'as' acts as a link.
Can you help me to learn more?
(Other definitions for reds that I've seen before include "Tidies up" , "Scarlet communists" , "Colours for communists" , "Left-wingers" , "Colourful communists" .)