Crossword Genius

Spirit: type unknown? (6)

Ross

I believe the answer is:

brandy

'spirit' is the definition.
(alcoholic spirit)

'type unknown?' is the wordplay.
'type' becomes 'brand' (type of product).
'unknown?' becomes 'y' (algebra).
'brand'+'y'='BRANDY'

(Other definitions for brandy that I've seen before include "Of a legal entity acting as an individual" , "Grape wine spirit" , "Strong drink distilled from wine" , "Distilled alcohol" , "Samuel Johnson's drink fit for heroes" .)

I've seen this clue in The Sun.
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