Tick tea or coffee (5)
I believe the answer is:
mocha
'coffee' is the definition.
(type of coffee drink)
'tick tea' is the wordplay.
'tick' becomes 'mo' (both can mean a very short amount of time).
'tea' becomes 'cha' (cha is a type of tea).
'mo'+'cha'='MOCHA'
'or' is the link.
(Other definitions for mocha that I've seen before include "Fine quality coffee" , "It may end up as grounds" , "Macho (anag.); coffee with chocolate" , "Coffee flavour" , "Coffee drink" .)