The most common and most likely answer to this crossword clue is the 4 plus 3 letter word LIKE MAD
L
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K
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M
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D
More clues leading to the result LIKE MAD
- With great enthusiasm, similar to mother and daughter
- Vigorously approve of start of mass publicity
- Furiously rejected female killer? Not half!
- Frantically, peer needs potty
- According to Spooner, Everyman’s dressed hurriedly
- Top hosts make merry wildly
- Spooner’s named boy, boy in crazy fashion
- As insane with great energy
- Stop short by lady, backtracking intently
Buddy explains!

The straight part
We know that "in crazy fashion" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case in crazy fashion = like mad.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.