The most common and most likely answer to this crossword clue is the 10 letter word SUBTERFUGE
I've seen this crossword clue in The Guardian
S
U
B
T
E
R
F
U
G
E
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 = subterfuge.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 SUBTERFUGE mean?
SUBTERFUGE noun- An indirect or deceptive device or stratagem; a blind. Refers especially to war and diplomatics.
- Deception; misrepresentation of the true nature of an activity.