Cake and a drink in heart of Burgundy (6)
I believe the answer is:
gateau
'cake' is the definition.
(I know that gateau is a type of cake)
'a drink in heart of burgundy' is the wordplay.
'drink' becomes 'tea' (tea is a drink).
'in' is an insertion indicator.
'heart of' indicates the central letters.
The middle of 'burgundy' is 'gu'.
'a'+'tea'='atea'
'atea' inserted into 'gu' is 'GATEAU'.
'and' acts as a link.
(Other definitions for gateau that I've seen before include "Richly decorated cake" , "Gooey cake" , "Cake for Pierre" , "Elaborate cake" , "Fancy cake" .)