It's meaning in terms of drink (7)
I believe the answer is:
italian
'it's' is the definition.
('it' can be short for Italian)
'in terms of drink' is the wordplay.
'terms of' becomes 'talia' (I can't explain this - if you can you should give a lot more credence to this answer).
'drink' means one lot of letters goes inside another.
'in' going around 'talia' is 'ITALIAN'.
'meaning' acts as a link.
Can you help me to learn more?
(Other definitions for italian that I've seen before include "being in Europe" , "Berlusconi's tongue" , "A Latin I find in Florence, say" , "Romance language" , "In a tail (anag)" .)
