What does the cryptic crossword clue "Tale's to be modified a minimal amount (5)" mean?

The definition is "minimal amount". The wordplay uses an anagram. anagram of TALE'S = LEAST; definition: "minimal amount" The answer is LEAST.

Tale's to be modified a minimal amount (5)

Daily Mail Cryptic #17348 | 6 Down | 2024-05-01 flower