Quite cautious (5)
I believe the answer is:
leery
'quite cautious' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for leery that I've seen before include "In slang, wary or suspicious - reely!" , "Cunning - wary" , "Cautious due to suspicions" , "Suspiciously cautious" , "Knowing" .)