Doctor taking tea and coffee (5)
I believe the answer is:
mocha
'coffee' is the definition.
(type of coffee drink)
'doctor taking tea' is the wordplay.
'doctor' becomes 'mo' (medical officer).
'taking' is a charade indicator (letters next to each other).
'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 "Dark brown" , "Kind of coffee" , "Coffee drink" , "Yemeni port; type of coffee bean" , "Fine-quality coffee" .)