The most common and most likely answer to this crossword clue is the 7 letter word MENORAH
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Buddy explains!

The straight part
We know that "it holds wicked things/a" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case it holds wicked things/a = menorah.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 MENORAH mean?
MENORAH noun- A holy candelabrum with seven branches used in the Temple of Jerusalem.
- A candelabrum (hanukkiah) with nine branches used in Jewish worship on Hanukkah.