What does the cryptic crossword clue "Loose cannons lack enforcement to some extent (7)" mean?

The definition is "Loose". The wordplay uses a hidden word. Hidden in [ to some extent ] "cannon S LACK EN forcement" The answer is SLACKEN.

Loose cannons lack enforcement to some extent (7)

Independent Cryptic #12041 | 18 Across | 2025-05-13 flower