A drink in heart of Burgundy, with ten cakes! (7)

I believe the answer is:

gateaux

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'cakes' is the definition.
(gateau is a kind of cake)

'a drink in heart of burgundy with ten' is the wordplay.
'a drink in heart of burgundy' becomes 'gateau' (I can't justify this - if you can you should believe this answer much more).
'with' means one lot of letters go next to another.
'ten' becomes 'X' (Roman numeral).
'gateau'+'x'='GATEAUX'

Can you help me to learn more?

(Other definitions for gateaux that I've seen before include "Rich cakes" , "CAKES], with access to the French" .)

I've seen this clue in The Telegraph.

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