Crossword Genius

Dry, for a drink? (7-4)

Ross

I believe the answer is:

alcohol-free

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

'dry' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'drink?' is the wordplay.
I cannot quite understand how this works, but
'drink?' could be 'alcohol' (alcohol is a kind of drink) and 'alcohol' is found in the answer.
The remaining letters 'free' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'for a' acts as a link.

Can you help me to learn more?

(Another definition for alcohol-free that I've seen is " Not intoxicating".)

I've seen this clue in The Mirror.
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