What does the cryptic crossword clue "Loner in tat to be replaced? That's narrow-minded (10)" mean?

The wordplay uses an anagram. anagram of LONER + IN + TAT = INTOLERANT The answer is INTOLERANT.

Loner in tat to be replaced? That's narrow-minded (10)

Daily Mail Cryptic #17249 | 13 Across | 2023-12-13 flower