Very dry variety of sherry (4)

I believe the answer is:

fino

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

'sherry' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

(Other definitions for fino that I've seen before include "Type of sherry" , "Bone dry sherry, served chilled" , "Driest of the sherries" , "Light dry sherry" , "Dry Spanish sherry" .)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app