Crossword Genius

Came up with Al incorrectly — it's my fault (3,5)

Ross

I believe the answer is:

mea culpa

'it's my fault' is the definition.
(Latin phrase meaning 'by my fault')

'came up with al incorrectly' is the wordplay.
'with' means one lot of letters go next to another.
'incorrectly' is an anagram indicator (I've seen this in other clues).
'came'+'up'+'al'='cameupal'
'cameupal' anagrammed gives 'MEA CULPA'.

(Other definitions for mea culpa that I've seen before include "Admission of fault" , "I'm guilty (Latin)" , "It's all my fault, said the old Romans" , "Admission of error (Latin)" , "Acknowledgment of error or guilt" .)

I've seen this clue in The Times.
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