The most common and most likely answer to this crossword clue is the 4 plus 4 letter word TRAP DOOR
I've seen this crossword clue in The Guardian
T
R
A
P
D
O
O
R
More clues leading to the result TRAP DOOR
- Bit upset and cross about magician’s exit
- Cross section pulled back to reveal hidden entrance
- Cross section lifted for flush access?
- Crosspiece put over hole in floor
- Cross piece over entrance to cellar?
- Rejected role, cross, having to go up a hole leading to the stage
- Crucifix role — revolutionary exit for thespian?
- Opening to lure party with gold
- Feature of stage trickery associated with nameless benefactor
Buddy explains!
The straight part
We know that "hidden entrance" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case hidden entrance = trap door.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.