What does the cryptic crossword clue "Hostile to piece from Alan Titchmarsh (4)" mean?

The definition is "Hostile". The wordplay uses a hidden word. Hidden in "hostile to piece from alAN TItchmarsh" The answer is ANTI.

Hostile to piece from Alan Titchmarsh (4)

Guardian Cryptic #29359 | 15 Across | 2024-04-17 flower