Cryptic crossword clue
Rehearsal of Copperfield illusion at Great Wall of China? 4-7

The most common and most likely answer to this crossword clue is the 12 letter word WALK-THROUGH

I've seen this crossword clue in The Guardian
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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 WALK-THROUGH mean?

WALK-THROUGH adjective
  1. That can be walked through
  2. Of passenger carriages in a train, having no doors in gangway connections between the carriages, creating a "see-through" effect through the train.
WALK-THROUGH noun
  1. The process of inspecting algorithms and source code by following paths through the algorithms or code as determined by input conditions and choices made along the way.
  2. A playthrough that details the steps involved in winning the game.
  3. A financial audit that traces a sample transaction through the system to ensure that it is processed and reported correctly.
  4. A theatrical or film rehearsal in which the actors move around the stage or set but are not in costume.

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