Cartel controlling alcohol (6)

I believe the answer is:

claret

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

'alcohol' is the definition.
(I know that claret is a type of red wine)

'cartel controlling' is the wordplay.
'cartel' can be anagrammed to 'CLARET'.
But, I'm not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for claret that I've seen before include "Red Bourdeaux wine" , "Deep purplish colour" , "Irish county starts the wine" , "Deep purplish-red" , "Dry red wine of Bordeaux" .)

I've seen this clue in The Mirror.

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