What does the cryptic crossword clue "Both came prepared to make public sacrifice (8)" mean?

The definition is "sacrifice". The wordplay uses an anagram. anagram of BOTH + CAME = HECATOMB; definition: "sacrifice" The answer is HECATOMB.

Both came prepared to make public sacrifice (8)

Daily Mail Cryptic #16842 | 3 Down | 2022-05-23 flower