Grain as distilled into drink (7)

I believe the answer is:

sangria

I'm a little stuck... Click here to teach me more about this clue!

'drink' is the definition.
(type of alcoholic drink)

'grain as distilled' is the wordplay.
'grain as' can be anagrammed to 'SANGRIA'.
However, I'm unsure how the anagram is indicated.

'into' acts as a link.

Can you help me to learn more?

(Other definitions for sangria that I've seen before include "Spanish alcoholic drink" , "Spicy Spanish wine drink" , "Red wine, fruit juice, sugar and spices" , "Spanish wine/fruit drink" , "Drink - Iran gas (anag)" .)

I've seen this clue in The Mirror.

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