Cryptic crossword clue
Like this puzzle you’d mess up on originally 12

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

I've seen this crossword clue in Independent
P
S
E
U
D
O
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Y
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S

Buddy explains!

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

What does PSEUDONYMOUS mean?

PSEUDONYMOUS adjective
  1. Of or pertaining to a pseudonym.
  2. (of a name) Fictitious.
  3. That uses a pseudonym.

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