What does the cryptic crossword clue "Fertiliser chemical - some spurn it religiously (5)" mean?

The definition is "Fertiliser". The wordplay uses a hidden word. Hidden in "fertiliser chemical - some spurN IT REligiously" The answer is NITRE.

Fertiliser chemical - some spurn it religiously (5)

Independent Cryptic #11774 | 8 Down | 2024-07-05 flower