Devious, untrustworthy (9)
I believe the answer is:
dishonest
I believe this is a double definition.
'devious' is the first definition.
(thesaurus)
'untrustworthy' is the second definition.
(associated in meaning)
(Other definitions for dishonest that I've seen before include "Not trustworthy" , "Bent" , "cheating" , "shady" , "Mendacious like hedonists" .)