It is charged for a portion without wine (3)

I believe the answer is:

ion

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

'it is charged' is the definition.
(I've seen this in other clues)

'a portion without wine' is the wordplay.
'ION' is hidden within the letters.
However, I'm unsure how the hidden word is indicated.

'for' is the link.

Can you help me to learn more?

(Other definitions for ion that I've seen before include "Subatomic particle" , "Eletrically charged particle" , "Particle (phys.)" , "Electrically charged atom or group of atoms" , "Electrically charged particle" .)

I've seen this clue in The Globe and Mail.

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