Cryptic crossword clue
Four children and I accompany mother full of anger one Sunday 12

The most common and most likely answer to this crossword clue is the 12 letter word QUADRAGESIMA

I've seen this crossword clue in The Times
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Buddy explains!

The straight part
We know that "one Sunday" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one sunday = quadragesima.
The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.
This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.

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