The most common and most likely answer to this crossword clue is the 6 letter word CURTIS
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More clues leading to the result CURTIS
Buddy explains!
The straight part
We know that "directly responsible for 7, 11, 12, 24 and 10" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case directly responsible for 7, 11, 12, 24 and 10 = curtis.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.