Instant tea and fine coffee (5)
I believe the answer is:
mocha
'fine coffee' is the definition.
(I've seen this before)
'instant tea' is the wordplay.
'instant' becomes 'mo'.
'tea' becomes 'cha' (cha is a type of tea).
'mo'+'cha'='MOCHA'
'and' acts as a link.
(Other definitions for mocha that I've seen before include "Coffee drink" , "Deep brown; a fine coffee" , "Strong dark coffee" , "Fine quality coffee" , "It may end up as grounds" .)