Creamy, strong drink is very sweet (12)
I believe the answer is:
butterscotch
'very sweet' is the definition.
'butterscotch' can be an answer for 'sweet' (I've seen this before). I'm not sure about the 'very' bit.
'creamy strong drink' is the wordplay.
'creamy' becomes 'butter' (I can't explain this - if you can you should believe this answer much more).
'strong drink' becomes 'Scotch' (Scotch is an example).
'butter'+'scotch'='BUTTERSCOTCH'
'is' acts as a link.
Can you help me to learn more?
(Other definitions for butterscotch that I've seen before include "confectionery" , "Hard brittle toffee" , "Kind of toffee" , "Brittle, yellow-brown sweet" , "Type of toffee" .)