None too sure (5)
I believe the answer is:
leery
(Other definitions for leery that I've seen before include "Sly, cunning" , "Suspiciously cautious" , "In slang, wary or suspicious - reely!" , "Cunning - wary" , "Cautious due to suspicions" .)
I believe the answer is:
leery
(Other definitions for leery that I've seen before include "Sly, cunning" , "Suspiciously cautious" , "In slang, wary or suspicious - reely!" , "Cunning - wary" , "Cautious due to suspicions" .)