The most common and most likely answer to this crossword clue is the 5 letter word LEERY
I've seen this crossword clue in The Guardian
L
E
E
R
Y
More clues leading to the result LEERY
- Knowing sort of look — mystery's ending
- Cautious line taken by US general
- Line taken by migrant — not very cunning
- Suspicious criminal activity near White House ends in trouble
- Cunning criminal merely wants money
- Suspicious of your slippery character, on reflection
- Wind-up? Why to be wary
- Wary of turn — spin — and googly ultimately
- Wary look at Brittney's rear
Buddy explains!

The straight part
We know that "wary" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case wary = leery.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 LEERY mean?
LEERY adjective- Cautious, suspicious, wary, hesitant, or nervous about something; having reservations or concerns.