Manipulate with devious motive (6)
I believe the answer is:
wangle
'manipulate' is the definition.
(synonyms)
'with devious motive' is the wordplay.
'with' becomes 'w' (short for with).
'devious motive' becomes 'angle' (I am not sure about this - if you are sure you should believe this answer much more).
'w'+'angle'='WANGLE'
Can you help me to learn more?
(Other definitions for wangle that I've seen before include "Accomplish something by scheming or trickery" , "Get by crafty means" , "Obtain through influence" , "Manipulate - falsify (a situation etc)" , "Obtain or arrange by using trickery" .)