The most common and most likely answer to this crossword clue is the 5 letter word HOCUS
I've seen this crossword clue in Financial Times
H
O
C
U
S
Buddy explains!
The straight part
We know that "trick" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case trick = hocus.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 HOCUS mean?
HOCUS noun- A magician, illusionist, one who practises sleight of hand.
- One who cheats or deceives.
- Trick; trickery.
- Drugged liquor.
- To play a trick on, to trick (someone); to hoax; to cheat.
- To stupefy (someone) with drugged liquor (especially in order to steal from them).
- To drug (liquor).
- To adulterate (food).