What does the cryptic crossword clue "Members of Biblical flock, as in ‘sheep’, possibly (9)" mean?

The wordplay uses an anagram. anagram of AS (synonym="AS") + IN (synonym="IN") + SHEEP (synonym="SHEEP") = EPHESIANS The answer is EPHESIANS.

Members of Biblical flock, as in ‘sheep’, possibly (9)

Guardian Cryptic #29600 | 13 Down | 2025-01-24 flower