Tea after second coffee (5)
I believe the answer is:
mocha
'coffee' is the definition.
(mocha is a kind of coffee)
'tea after second' is the wordplay.
'tea' becomes 'cha' (cha is a type of tea).
'after' is a charade indicator (letters next to each other).
'second' becomes 'mo' (both are short periods of time).
'cha' after 'mo' is 'MOCHA'.
(Other definitions for mocha that I've seen before include "Macho (anag.); coffee with chocolate" , "It may end up as grounds" , "Arabian coffee" , "Fine-quality coffee" , "Yemeni port; type of coffee bean" .)