Cryptic crossword clue
Spooner’s baking disaster is warning to the complacent 4-2,4

The most common and most likely answer to this crossword clue is the 7 plus 4 letter word WAKE-UP CALL

I've seen this crossword clue in The Guardian
W
A
K
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Buddy explains!

The straight part
We know that "warning to the complacent" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case warning to the complacent = wake-up call.
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.

Crossword Answer definitions

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