What does the cryptic crossword clue "Assume one felon's uptake is wrong (4,4,7)" mean?

The wordplay uses an anagram. anagram of ONE + FELON'S + UPTAKE = TAKEUPONONESELF The answer is TAKEUPONONESELF.

Assume one felon's uptake is wrong (4,4,7)

Daily Mail Cryptic #17454 | 1 Down | 2024-09-26 flower