What does the cryptic crossword clue "Trademarked material in novel, cross-referenced (6)" mean?

The definition is "Trademarked material". The wordplay uses a hidden word. Hidden in "trademarked material in noVEL, CROss-referenced" The answer is VELCRO.

Trademarked material in novel, cross-referenced (6)

Guardian Cryptic #28134 | 7 Down | 2020-05-15 flower

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