What does the cryptic crossword clue "Public Order Act to stop free press (10)" mean?

The wordplay uses an anagram. anagram of ACT (synonym="ACT") + TO (synonym="TO") + PRESS (synonym="PRESS") = SPECTATORS The answer is SPECTATORS.

Public Order Act to stop free press (10)

Guardian Cryptic #29127 | 6 Down | 2023-07-20 flower