Way to produce tea and coffee (5)
I believe the answer is:
mocha
'coffee' is the definition.
(type of coffee drink)
'way to produce tea' is the wordplay.
'way to produce' becomes 'MO' (modus operandi, way of doing things).
'tea' becomes 'cha' (cha is a type of tea).
'mo'+'cha'='MOCHA'
'and' is the link.
(Other definitions for mocha that I've seen before include "Kind of coffee" , "Coffee drink" , "Deep brown; a fine coffee" , "Arabian coffee" , "Fine-quality coffee" .)