Colour of instant beverage (5)
I believe the answer is:
mocha
This clue might be a double definition.
'colour of instant' is the first definition.
'mocha' can be an answer for 'colour' (mocha is a shade of brown). I am unsure of the 'of instant' bit.
'beverage' is the second definition.
(mocha is a kind of beverage)
Can you help me to learn more?
(Other definitions for mocha that I've seen before include "Dark brown" , "Fine quality coffee" , "Kid" , "Coffee drink" , "It may end up as grounds" .)