What does the cryptic crossword clue "Secreted in chancel even, this ordinal (8)" mean?

The definition is "ordinal". The wordplay uses a hidden word. Hidden in "secreted in chancEL EVEN, THis ordinal" The answer is Eleventh.

Secreted in chancel even, this ordinal (8)

Telegraph Prize Cryptic #3057 | 11 Across | 2020-05-24 flower