Jo's style of product? (5)

I believe the answer is:

brand

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

'style of product?' is the definition.
'brand' can be an answer for 'style' (thesaurus). I am not certain of the 'of product?' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for brand that I've seen before include "Type of product - identifying mark on livestock" , "Label" , "Trademark - burn with hot iron" , "Owner's mark on cattle" , "Stamp" .)

I've seen this clue in the Evening Standard.

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