What does the cryptic crossword clue "I’m stopping horrible racists with swords (9)" mean?

The definition is "swords". The wordplay uses an anagram. anagram of I’M + RACISTS = SCIMITARS; definition: "swords" The answer is SCIMITARS.

I’m stopping horrible racists with swords (9)

Guardian Cryptic #29604 | 27 Across | 2025-01-29 flower