Untrustworthy, deceitful (9)
I believe the answer is:
dishonest
This clue is a double definition.
'untrustworthy' is the first definition.
(associated in meaning)
'deceitful' is the second definition.
(similar in meaning)
(Other definitions for dishonest that I've seen before include "Not straightforward" , "Not trustworthy" , "Deceitful - hedonists (anag)" , "shady" , "cheating" .)