What does the cryptic crossword clue "Grandees only put in order in church body (7,5)" mean?

The wordplay uses an anagram. anagram of GRANDEES + ONLY = GENERALSYNOD The answer is GENERALSYNOD.

Grandees only put in order in church body (7,5)

Daily Mail Cryptic #17157 | 29 Across | 2023-08-07 flower