It takes two to make colour vanish (5)
I believe the answer is:
tango
'it takes two' is the definition.
(as in the phrase 'it takes two to tango')
'colour vanish' is the wordplay.
'colour' becomes 'tan' (tan is a kind of colour).
'vanish' becomes 'go' (going is a kind of vanishing).
'tan'+'go'='TANGO'
'to make' is the link.
(Other definitions for tango that I've seen before include "reputedly takes two" , "Argentine dance" , "Dance originally from Buenos Aires" , "something seen in ballroom?" , "Dance music" .)