Trade name or trademark (5)
I believe the answer is:
brand
I believe this clue is a double definition.
'trade name' is the first definition.
(synonyms)
'trademark' is the second definition.
(I've seen this in another clue)
(Other definitions for brand that I've seen before include "Mark (by burning)" , "Stamp" , "Make of product" , "Type of product, mark cattle" , "Type of product; sword" .)