What does the cryptic crossword clue "Chatter soon confused as regards such a matter (2,4,5)" mean?

The wordplay uses an anagram. anagram of CHATTER + SOON = ONTHATSCORE The answer is ONTHATSCORE.

Chatter soon confused as regards such a matter (2,4,5)

Daily Mail Cryptic #17151 | 12 Across | 2023-07-28 flower