The most common and most likely answer to this crossword clue is the 10 letter word WORDSEARCH
I've seen this crossword clue in The Guardian
W
O
R
D
S
E
A
R
C
H
More clues leading to the result WORDSEARCH
Buddy explains!
The straight part
We know that "puzzle" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case puzzle = wordsearch.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 WORDSEARCH mean?
WORDSEARCH noun- (games) A word game consisting of a grid of letters, the aim of which is to find an array of given words hidden within the grid.