Tea follows instant coffee (5)
I believe the answer is:
mocha
'coffee' is the definition.
(mocha is a kind of coffee)
'tea follows instant' is the wordplay.
'tea' becomes 'cha' (cha is a type of tea).
'follows' is a charade indicator (letters next to each other).
'instant' becomes 'mo'.
'cha' put after 'mo' is 'MOCHA'.
(Other definitions for mocha that I've seen before include "Leather" , "Yemeni port; type of coffee bean" , "Fine quality coffee" , "Kind of coffee" , "It may end up as grounds" .)