The most common and most likely answer to this crossword clue is the 6 letter word PUT-UP
I've seen this crossword clue in The Guardian
P
U
T
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U
P
More clues leading to the result PUT-UP
Buddy explains!

The straight part
We know that "Deviously staged" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case deviously staged = put-up.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 PUT-UP mean?
PUT-UP noun- Something prearranged or faked in order to trick someone or to advance one's own interests.
- (of an event) Secretly arranged in advance, especially in order to defraud someone or to advance one's own interests.