Tricky, dishonest (5)
I believe the answer is:
dodgy
I believe this is a double definition.
'tricky' is the first definition.
(synonyms)
'dishonest' is the second definition.
(dodgy can mean disreputable or dubious)
(Other definitions for dodgy that I've seen before include "Not reliable (colloq.)" , "Disreputable" , "Risky; dishonest" , "Not reliable; dangerous" , "Dubious; dicey" .)